SCP Installation Manual - MGI SpeedWare · This installation manual contains general specifications...

www.mgispeedware.com — A Division of Medusa Group Inc.

Installation Manual

Switch Control Panels (SCP)

Version 1.0 • November 2017

SCP Installation Manual

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Table of Contents

1. Introduction ................................................................................................. 3

2. Specifications............................................................................................... 4

3. General Installation .................................................................................. 6

4. Wire Gauge Selection – Table 1 ........................................................... 8

5. DIYS – Wire Terminals ............................................................................ 10

6. DIYS – Race Level Rockers .................................................................... 11

7. DIYS – Pro-Street Rockers ..................................................................... 12

8. DIYS – Off-Road Metal Toggle Switches .......................................... 13

9. DIYS – Off-Road LED Toggle Switches ............................................. 13

10. DIYS – Classic Car Duckbill Toggle Switches .............................. 14

11. DIYS – Classic Car Surface Mount Rockers .................................. 15

12. DIYS – Momentary Pushbutton Connections ............................. 15

13. DIYS – Ignition Key Switch Connections ...................................... 16

14. DIYS – Additional Notes ....................................................................... 17

15. Warranty ..................................................................................................... 19

16. Automotive Specs Sheet ...................................................................... 21


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MGI highly recommends reading this Installation Manual in its entirety

before proceeding with purchase and installation of any SCP.

1 Introduction

This installation manual contains general specifications for all Switch Control Panels (SCPs) as

well as individual installation instructions. This manual is intended to be used in conjunction

with the SCP Electrical Drawing. In addition to the information in this manual, other helpful

resources can be found online at:

www.mgispeedware.com/guides-documentation

Nomenclature applied throughout this document

MGI – Medusa Group Inc.

NEC – National Electrical Code

SAE – Society of Automotive Engineers

SCP – Switch Control Panel

RCP – Relay Control Panel


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2 Specifications

2.1 Each MGI SCP is provided as a components kit. Optional factory assembly is available

prior to checkout at additional cost.

2.2 SCPs are available with the following switch types:

2.2.1 Race Level horizontal rocker switches (illuminated LED – 20A).

2.2.2 Race Level vertical rocker switches (illuminated LED – 20A).

2.2.3 Pro-Street rocker switches (illuminated LED – 15A).

2.2.4 Classic Car duckbill toggle switches (illuminated neon – 15A).

2.2.5 Classic Car automotive type, surface-mount rocker switches (illuminated LED –

15A).

2.2.6 Off-Road bat-handle toggle switches (non-illuminated – 20A).

2.2.7 Off-Road bat-handle toggle switches (illuminated green tip LED – 20A).

2.3 Although aluminum enclosures are available for each SCP, weatherproof enclosures are

only available for Race Level horizontal SCPs and Off-Road non-illuminated SCPs.

2.4 Classic Car and Off-Road SCPs come with optional branch breakers and momentary LED

pushbutton or ignition key switch. All SCPs come with main feeder conductor and a

main fuse.

2.5 Unless otherwise selected using MGI’s online Fuse Size Calculator prior to checkout,

SCPs are provided as standard with the following main feeder conductor and main fuse:


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2.5.1 Loads connected to an SCP are all expected to be operated as non-continuous

use (defined by the NEC as having less than 3 hours of continuous use).

Accordingly (and with a slight additional amperage capacity over that required

by the NEC), the red main feeder conductor is sized to carry a minimum of:

(125% 𝑥 𝑙𝑎𝑟𝑔𝑒𝑠𝑡 𝑖𝑛𝑑𝑖𝑣𝑖𝑑𝑢𝑎𝑙 𝑙𝑜𝑎𝑑 𝑎𝑚𝑝𝑒𝑟𝑎𝑔𝑒)

+

(𝑇𝑜𝑡𝑎𝑙 𝑎𝑚𝑝𝑒𝑟𝑎𝑔𝑒 𝑜𝑓 𝑎𝑙𝑙 𝑜𝑡ℎ𝑒𝑟 𝑖𝑛𝑑𝑖𝑣𝑖𝑑𝑢𝑎𝑙 𝑙𝑜𝑎𝑑𝑠 𝑡ℎ𝑎𝑡 𝑎𝑟𝑒 𝑐𝑜𝑛𝑛𝑒𝑐𝑡𝑒𝑑 𝑡𝑜 𝑡ℎ𝑒 𝑆𝐶𝑃)

2.5.2 SCP main fuse sizes are provided by MGI as general application only and are

sized as follows:

Caution! Always follow the manufacturer’s fuse size requirement (or any other requirements) for your specific

load over that of the general recommendations in this manual.


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3 General Installation

3.1 Install the SCP in a clean and dry environment.

3.2 Connect one end of the red main feeder conductor to the car starter’s battery power

terminal. Install the supplied main fuse and holder (shown as F10 in SCP Electrical

Drawing) in the main feeder conductor between the starter and the MGI Switch Control

Panel.

3.3 SCPs are provided with GXL #14 AWG wire for the output of each switch (with the

exception of output wire for an SW-PB101 pushbutton switch, which is GXL #16 AWG). It

is also the user’s responsibility to install proper output (branch) fuses/breakers as may

be required by the NEC and SAE for individual loads.

3.4 Always use a switching relay for any electric motor, spotlight, or high-current resistive

loads (amplifiers, etc.). Switching relays are also necessary on the output of an MGI SW-

PB101 pushbutton switch. Please see MGI’s RL-5B-40/40 or RL-5B-50/80 relays.

3.5 SCPs are supplied with 5 feet of wire loom to be installed around the conductors

between the SCP and an MGI RCP. SCP enclosures and RCP kits are supplied complete

with a strain-relief connector that easily encompasses the wire loom encased

conductors between the SCP enclosure and RCP.

3.6 If your SCP installation does NOT include the installation of an RCP, install the output

conductors from the SCP to each of your branch circuits – providing each branch circuit

meets the use criteria for a switch without switching relay, and providing each individual

load’s rated amperage is within the switch’s rated load capacity listed in Article 2.2 of

this installation manual.

3.7 Alternatively, install the conductors between any SCP and RCP per the appropriate RCP

Electrical Drawing. When an SCP is connected to an RCP (with the SCP’s input connected

to RCP Terminal #11), your loads cannot be connected directly to an SCP switch output

because the RCP Terminal #11 is fed with a #16 AWG and fused at 5A. RCP Terminal #11

is a control circuit only.


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3.7.1 Where you want to operate some loads directly from the output of an SCP

switch, and other loads from an RCP (Eg: Connecting an SCP8 to an RCP6), then

the input power to the SCP must be taken from the RCP input red battery

terminal (not from RCP terminal #11). The main feeder conductor and main fuse

must be properly sized for the entire load.

3.8 All SCP installations should be completed minimally per the current and wire sizing

specifications outlined in the Wire Gauge Selection – Table 1 outlined below, and per

SAE electrical codes for low voltage circuits under 32v.

3.9 Where an SCP is connected to an RCP, the main fuse supplied with the SCP kit should

not be used provided that all SCP circuits are used to switch or control an RCP relay.

3.10 To change the main fuse (shown as F10 in SCP Electrical Drawing), gently squeeze the

fuse holder cover using the thumb and forefinger of both hands, with thumb/forefingers

placed on the sides of the cover – about 1” from each end of the cover – and lift

carefully. After changing the fuse, the fuse cover should be replaced using the same

thumb/forefinger aforementioned technique. Failure to follow these instructions can

result in damage to the plastic fuse cover mounting tabs.

3.11 Some MGI SCPs are supplied with factory-installed LEDs. These 3mm LEDs are very

bright. For more subtle LED light (50% less candlepower), add a separately purchased

EP-R101 damper resistor kit.

3.11.1 A single EP-R101 damper resistor can be used with an SCP where 4 to 8 LEDs are

already installed. Simply disconnect the 3mm LED (black wire with ring terminal)

from its ground terminal and add the damper resistor in series between the

disconnected LED ring terminal and ground.

3.11.2 Insulate the resistor and/or black wire ring terminals as may be required.


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4 Wire Gauge Selection — Table 1

NEC Recommended AWG/Ampacity Chart for Copper GXL or SGX Automotive Primary Wire

(Rated -51C to +125C, applied in a “Free Air” 12vDC circuit)

Table 1: Found online at www.mgispeedware.com/guides-documentation/wire-size-chart/

4.1 This printable table is a “captured” photo of the online interactive chart with

calculations set for a) single load branch conductors, b) 20°C ambient air temperature,

and c) 3% voltage drop based on a 13.8vDC nominal voltage.


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4.1.1 Use the interactive version of Table 1 on MGI’s website located under Guides

and Documentation to properly determine the size of your branch and feeder

conductors.

4.2 While this table outlines specifics for single copper conductors in Free Air per the NEC,

your automotive electrical installation does not necessarily conform to a “Free Air”

definition. Granted, your conductors are not installed in a heat encompassing shield

such as metal conduit or PVC tube either. Your conductors may be held firmly inside

(breathable) wire loom or sleeving, and may be tie-wrapped or secured with a multitude

of other conductors.

4.2.1 MGI can, however, appropriately suggest that you increase the Ambient Air

Temperature correction factor to allow for any heat restraints outlined in Article

4.2.

4.3 Maximum Voltage Drop – NEC standards allow for a maximum 3% voltage drop in

feeder conductors, and a maximum 5% voltage drop in branch conductors.

4.4 Branch conductor – Branch conductors are sized to carry 100% of load rated amperage

per the NEC minimal requirement for non-continuous use (defined by the NEC as having

less than 3 hours of continual use).

4.5 Feeder conductor – Feeder conductors are sized slightly larger than the NEC minimal

requirement for non-continuous use. Feeder conductors are sized to carry a minimum of

125% of the largest load’s rated amperage + the total amperage of all other individual

loads that are connected to the Feeder conductor.


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5 DIYS (Do It Your Self) — Wire Terminals

Instructions For LED Red wires to Parallel Connect Onto Other Wire Terminals

0.225 (Strip)

0.35 (Strip)

For Red Ring Terminal

The leading edge of the LED copper should enter the Red Ring Terminal about 1/8"

before the leading edge of the # 14 AWG (GXL)copper does. This will ensure that

the small LED Red wire is firmly connected within the Red Ring Terminal.

GXL # 14 AWG

LED Red wire # 26 AWG

0.330" (Strip)

0.455 (Strip)

For (Blue or Red)Female Disconnect

The leading edge of the LED copper should enter the Female Disconnect about 1/8"

before the leading edge of the # 14 AWG (GXL)copper does. This will ensure that

the small LED Red wire is firmly connected within the Female Disconnect.

GXL # 14 AWG

LED Red wire # 26 AWG


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6 DIYS — Race Level Rocker

Race Level Rocker Connection Schemes

32

712vDC LOAD

Switch LED Has

Polarity.

N/A

12vDC LOAD 1

Switch LED Has

Polarity.

32

7

1

LOAD 2

Note 1: Switch closes (2 to 1)or(2 to 3) - not both at the same time. If

the user needs to have LOAD 1 turned on in(2 to 1)position, and Both

LOAD 1 and LOAD 2 turned on in(2 to 3)position, then add a (load

current)sized diode between terminal 1 and terminal 3.

Race Level Rocker

Race Level Rocker

32

712vDC LOAD

Switch LED Has

Polarity.

N/A

Race Level Rocker

Race Level Rocker Switch Connection Scheme

12vDC LOAD 1

Switch LED Has

Polarity.

N/A

32

7

1

LOAD 2

Note 1: Switch closes (2 to 1) or (2 to 3)- not both at the same time. If the

user needs to have LOAD 1 turned on in (2 to 1)position, and Both LOAD 1

and LOAD 2 turned on in (2 to 3) position, then add a (load current)sized

diode between terminal 1 and terminal 3.

Race Level Rocker

Switch Models #: SW-ROC-RL101/X

Switch Models #: SW-ROC-RL102/R

Switch Models #: SW-ROC-RL103/X

Switch Models #: SW-ROC-RL104/B

Suffix (X)= Any letter.


Alternate Connection




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7 DIYS — Pro-Street Rocker

Pro-Street Level Rocker Connection Schemes

Switch Relative Position

from terminal side.


from terminal side.

Pro-Street Level Rocker Switch Connection Scheme

Switch Models #: SW-ROC-PS30X/X


Switch Model #: SW-ROC-PS301/R

LOAD

12vDC LOAD12vDCSwitch is

Non-illuminated.

(OR)

Pro-Street Rocker


from terminal side.

Switch Model #: SW-ROC-PSBLK




LOAD

12vDC LOAD12vDCSwitch LED Has

NO Polarity.

(OR)

Pro-Street Rocker

LOAD

12vDC LOAD12vDCSwitch LED Has

NO Polarity.

(OR)

Pro-Street Rocker


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8 DIYS — Classic Car Duckbill Toggle

Classic Car Duck Bill Toggle Switch Connection Scheme

9 DIYS — Off-Road LED Toggle

Metal Bat Handle Toggle Switch c/w Green Tip LED, Switch Connection Scheme

LOAD

12vDC

Classic Car Duck Bill Toggle Switch

Switch Relative Position from terminal side.

Classic Car Duck Bill Toggle Switch Connection Scheme

Switch Models #: SW-TOG-DB114/X


Paper Label This Side

Switch LED Has

Polarity.

N/A


13

12vDC LOAD

Switch LED Has

Polarity.

N/A

Metal Bat Handle Toggle c/w Green Tip LED

Metal Bat Handle Toggle Switch c/w Green Tip LED Switch Connection Scheme

Switch Model #: SW-TOG-LBH113


from terminal side.



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10 DIYS — Off-Road Metal Toggle

Off-Road Metal Bat Handle Toggle Switch Connection Schemes

LOAD 1321

LOAD 2

Note 1: Switch closes (2 to 1) or (2 to 3) - not both at the same time. If the user

needs to have LOAD 1 turned on in (2 to 1) position, and Both LOAD 1 and LOAD

2 turned on in (2 to 3) position, then add a (load current) sized diode between

terminal 1 and terminal 3.

Off-Road Metal Bat Handle Toggle Switch Switch Model #: SW-TOG-BH104

12vDC LOAD 1654

LOAD 2

Note 1: Switch closes (2 to 1) + (5 to 4)or (2 to 3) + (5 - 6) - not both at the same

time. Terminals (1 and 4), (2 and 5), (3 and 6)are all indepenent from each other.


32112vDC LOAD 1

654

LOAD 2




321

12vDC

LOAD 1654




321

654

321BLACK

REDJumpers

Switch (External) View Switch (Internal) View

Reversing a 12vDC PM Motor

12vDC

PM Motor

LOAD

12vDC

Off-Road Metal Bat Handle Toggle Switch


from terminal side.

Off-Road Metal Bat Handle Toggle Switch Connection Schemes

Switch Model #: SW-TOG-BH101

LOAD

12vDC

Off-Road Metal Bat Handle Toggle Switch


from terminal side.

Switch Model #: SW-TOG-BH102

Switch has No polarity. Switch has No polarity.

1 3 1 3

12vDC LOAD 1321

LOAD 2

Note 1: Switch closes (2 to 1) or (2 to 3) - not both at the same time. If the user

needs to have LOAD 1 turned on in (2 to 1) position, and Both LOAD 1 and LOAD

2 turned on in (2 to 3) position, then add a (load current) sized diode between

terminal 1 and terminal 3.


12vDC


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11 DIYS — Classic Car Surface Mount Rocker

Classic Car Automotive Surface Mount Rocker Switch Connection Scheme

12 DIYS — Momentary Pushbutton

Momentary Pushbutton Switch Connection Scheme

LOAD

12vDC

Classic Car Automotive Surface Mount Rocker


from terminal side.

Classic Car Automotive Surface Mount Rocker Switch Connection Scheme

Switch Models #: SW-ROC-SM20X/X


Switch Paper Label

Switch LED Has

Polarity.

N/A


12vDC

Momentary Pushbutton Switch

Momentary Illuminated LED RING Pushbutton Switch

Relative Position from terminal side.

Momentary Pushbutton Switch Connection Scheme

Switch Model #: SW-KEY101

C

NO

NC

LOAD

SOLENOID

OR RELAY

Fuse as may be required.

Note: MGI (crimp) Female disconnects must have wire inserted into the

crimp connector as far as the wire can be inserted into the funel of the Female

disconnect part of the terminal (about 3/8"). This will keep the Female

Disconnect firmly attached to the pushbutton switch.

(3A Maximum Resistive Load)

# 16 AWG

# 16 AWG


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13 DIYS — Ignition Key Switch

Ignition Key Switch Connection Scheme

12vDC

Ignition Key Switch

Ignition Key Switch Relative

Position from terminal side.

Ignition Key Switch Connection Scheme

Switch Model #: SW-KEY101

BAT BATSTART SOLENOID

SSORANGE # 14 AWGST

IGN ACC

RED # 10 AWG

RED # 10 AWG

# 14 AWG LOADS WITHOUT AUTO RUNNING

- AUDIO

- INTERIOR LIGHTING

- EMERGENCY FLASHERS

- ETC.

LOADS WITH AUTO RUNNING

- IGNITION

- HEADLIGHTS

- AUDIO

- INTERIOR LIGHTING

- EMERGENCY FLASHERS

- FANS

- PUMPS

- ETC.

Fuse all circuits as may be required.


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14 DIYS Notes

14.1 When placing SCP description labels onto the SCP faceplate, put a piece of masking tape

along the top or bottom line where you want to place the labels. Then peel only a

corner off a label from the label sheet. Place a (clean) small flat screwdriver under the

peeled label corner and press slightly so that the label stays on the screwdriver. Then lift

off the label while it is still stuck on the screwdriver. This will allow you to better

position the label along the masking tape edge for that “straight” look – without leaving

fingerprints under the label.

14.2 ON/OFF toggle switch nameplates are supplied with metal bat-handle toggle switches

only. The nameplates can also be purchased separately for use with duckbill toggle

switches. The nameplates have a small male tab on the bottom of their center hole

which helps to keep the nameplates vertically aligned onto a metal toggle switch. When

using these nameplates with duckbill toggle switches, you must file off the small male

tab in the nameplate so that the nameplate can be mounted on the duckbill toggle.

Unlike metal bat-handle toggle switches, the duckbill toggle does not have a female tab

for aligning ON/OFF nameplates.

14.3 Use only BLUE female disconnect crimp terminals on any Classic Car automotive surface

mount switch (SW-ROC-SM20X/X) male spade terminal. While RED female disconnect

crimp terminals are generally the same physical [spade] size as are BLUE female

disconnect wire crimp terminals, the RED female disconnects supplied by MGI will NOT

fit the Classic Car automotive surface mount switch male spade terminals.

14.4 Crimp Terminals – Red crimp terminals are generally used for #18 - #16 AWG wire while

blue crimp terminals are generally used for #16 - #14 AWG, with Yellow crimp terminals

generally used for #12 - #10 AWG wire. Primary automotive wire such as GXL has a

smaller circumference than does TEW and other types of industrial wire. For this reason,

red crimp terminals supplied my MGI may better suit #18 - #14 AWG GXL wire. Always

use a crimp terminal that closely fits the wire you are using; doing so will help to ensure

proper crimping of terminal onto wire.

14.5 Non-illuminated metal bat-handle toggle switches have screw terminals.

14.6 When connecting a wire ring terminal under the switch screw terminal, it is important to

firmly hold BOTH the wire ring terminal and switch body so that tightening the switch

screw terminal does not twist that terminal loose from the switch body pin.


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14.7 Always place the wire ring terminal on the switch screw terminal as shown below so

that BOTH the wire ring terminal and switch body can be held firmly in the same hand

while tightening the switch screw with a Phillips screwdriver in the other hand:

YES

NO

Bat Handle Toggle Switch

wire Ring Terminal

wire Ring Terminal

Bat Handle Toggle Switch

Switch Body Pin Switch Body Pin


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15 Warranty

15.1 Medusa Group Inc. warrants each of its products to be free from defects in materials or

workmanship when operated under normal working conditions and in accordance with

manufacturer's installation and operating instructions, for a period of twelve months

from the date of purchase. This warranty shall be in lieu of any other warranty

expressed or implied, including but not limited to any implied warranty of

merchantability or fitness for a particular purpose.

15.2 MGI shall not be responsible for removal, installation, or any other incidental or

consequential damages arising from, or caused by the use of any of its products.

15.3 MGI’s liability under this warranty shall be solely limited to the replacement or repair of

its defective product within the warranty period, and shall not be liable under any

circumstances for any damages including but not limited to personal injury or labor

costs. Under no circumstances will MGI be responsible for any repairs made by anyone

other than the factory or authorized repair depot, unless such repairs have been

authorized in writing by MGI.

15.4 Remedy for warranty shall include one of the following:

Where the complete product is returned to MGI (15.4.1)

15.4.1 MGI will repair or replace, at its sole discretion, any component that has been

found to be defective by the manufacturer, and is within the warranty period,

provided that the complete product is shipped with factory authorization,

freight prepaid, to the nearest MGI factory outlet or authorized service facility.

Upon completion of warranty repairs, MGI, or its authorized service center will

return the product freight prepaid, using Standard Ground delivery service as

selected by MGI.

Where the product remains installed in the automobile, and where one or more components are determined to be faulty (15.4.2 – 15.4.3)

15.4.2 Where any component is determined by MGI to be faulty within the warranty period, and where such a component is provided for under the terms of warranty, the replacement component will be shipped freight prepaid, (component pre-billed to the client) using Standard Ground delivery services as selected by MGI.


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15.4.3 Any faulty or damaged component that has been replaced under the terms of

warranty must be returned to MGI within 15 days, freight prepaid, in order to validate the warranty. MGI will evaluate and will either approve or deny the warranty claim, and will credit the client’s payment method according to MGI’s ruling. Some exceptions may apply.

15.5 Where any warranty component is requested by the recipient with delivery service

other than Standard Ground, the product will be shipped freight collect only.


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16 Automotive Specs

Loads

Load Type (Eg: Water Pump, Fan 1, Fan 2), etc.

Connected to RCP (terminal #)

Load Amps

Fuse size

Load 1

Load 2

Load 3

Load 4

Load 5

Load 6

Load 7

Load 8

Load 9

Load 10

Load 11

Load 12

For technical help, contact MGI at [email protected]

SCP Installation Manual - MGI SpeedWare · This installation manual contains general specifications...

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