Post on 03-Apr-2018
7/28/2019 EEE 314 Lecture 7 Drawing A
1/19
EEE 314
Electrical Services Design
Conduit Layout Lecture 2
Prepared by: Md. Itrat BinShams (Sanin)
7/28/2019 EEE 314 Lecture 7 Drawing A
2/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Some points related to previous lecture:
5A receptacle points can be a three pin or two pin points, but a 15A receptaclepoint is always a three pin point.
While designing a single storied building, we are always seeing the conduits going
down. So conduit going down mark should be placed after each conduittermination.
In fittings and fixture diagram fluorescent lights must be small in length comparedto the diameter of ceiling fan.
Conduits must be connected to the point of appliances electrical connection. Notto appliances outside edge. As,
Any size of conduits can be used but only those available to the market have to beused.
5A components are driven by 1.5 mm2 wires and 15A components from 4 mm2. 2.5mm2 wires are also used to drive some instruments but it is usual practice to use 4
Wrong Right
7/28/2019 EEE 314 Lecture 7 Drawing A
3/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Some general concepts about a condui t layout:
There should be as small number of cross points of conduits as possible.
If more than one conduit is to be placed in a room then 90oalignment between theconduits should be kept as long as possible.
Prime target of conduit layout is to use least length of conduit not least number ofthem.
There is no need to place a separate conduit for two switchboard interconnection.
Any other conduits can be used to take the connecting wire.
Wires are cheaper than conduits, so there should be no law about how much wireis need in a conduit layout.
Wire cross
sections are
expressed as this
7/28/2019 EEE 314 Lecture 7 Drawing A
4/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Example 1:Fittings and Fixtures layout:
F1
F3
TV1TS1
SS1
C2
A1
3
4
A2
5
7/28/2019 EEE 314 Lecture 7 Drawing A
5/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Conduit Layout:
2
L
3
L
4
5
L
L
L
L
S
S
T
L
S
F
FF
S
C2
C3C6 C7
C2
C1
C1
C4
C2
C1
C1
C3
C1
C2
C1
C1
7/28/2019 EEE 314 Lecture 7 Drawing A
6/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Switchboard Connection Diagram:
SB 1
R
K K C F SS ST TS
1 2 1 1 1 1 1
SB 2
R
A C F SS
1 2 2 2
SB 3
R
A F SS
2 3 3
SB 4SB 5
7/28/2019 EEE 314 Lecture 7 Drawing A
7/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Example 2:Fittings and Fixtures layout:
F1
F2
F3
K1 K1
C1
TV1TS1
1SS1
2
SS2
C2
A1
ST1
3
SS3A2
5
SL1 5A
A3
A4
6
7
L1
L2
L3
7/28/2019 EEE 314 Lecture 7 Drawing A
8/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Conduit Layout:
2
L
L
L
L L
L
S
S
T
L
S
F
FF
S
C2
C3
C6 C7
C1
C1
C1
C4
C2
C1
C2
C4
C1
C2
C1
C1
C1
C1
C2
C2
C1
7/28/2019 EEE 314 Lecture 7 Drawing A
9/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Switchboard Connection Diagram:
SB 1
R
K K C F SS ST TS
1 2 1 1 1 1 1
SB 2
R
A C F SS
1 2 2 2
SB 3
R
A F SS
2 3 3
SB 4SB 5SB 6SB 7
7/28/2019 EEE 314 Lecture 7 Drawing A
10/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Example 3:Fittings and Fixtures layout:
F1
F2F3
K1K1
TV1
1SS1
2
SS2
C2
ST1
3
SS3
5
SL1 5A
A3
A4
6L1
L2
L3
S115A
7/28/2019 EEE 314 Lecture 7 Drawing A
11/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Conduit Layout:
2
L
3
L
5
L
L L
L
S
S
T
S
F
FF
C2
C3C6 C7
C1
C1
C4
C2
C1
C2
C4
C1
C2
C1
C1
6
C1
C1
C2
C2
C1
S
C8 C9
C8,9
Main
Earthing
2
GI PipeContaining
Incoming
Cable
7/28/2019 EEE 314 Lecture 7 Drawing A
12/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Switchboard Connection Diagram:
SB 1
R
K K C F SS ST TS
1 2 1 1 1 1 1
SB 2
R
A C F SS
1 2 2 2
SB 3
R
A F SS
2 3 3
SB 4SB 5SB 6SB 7
2X1.5 mm2
ECC 16SWG
2X1.5 mm2
ECC
16SWG
2X1.5 mm2
ECC
16SWG 2X2.5 mm2
ECC
16SWG
2X2.5 mm2
ECC
16SWG
7/28/2019 EEE 314 Lecture 7 Drawing A
13/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Distribution Board Connection Diagram:
Legends of Wires:
C1 = 2X1.5mm2
C2 = 4X1.5mm2C3 = 6X1.5mm2
C4 = 8X1.5mm2
C5 = 10X1.5mm2
C6 = 12X1.5mm2
C7 = 14X15mm2
SB4 SB6 S1
2X70mm2
PVC/PVC
Underground CablsThrough 2
GI Pipes
100A SP
MCB
To Supply
MDB
2X2.5 mm2
ECC 16 SWG2X2.5 mm
2
ECC 16 SWG
2X4 mm2
ECC 14 SWG
10 10 15
7/28/2019 EEE 314 Lecture 7 Drawing A
14/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Some points related to this lecture:
Three pin receptacle points to drive exhaust fans are denoted as, .Like other lintel level components.
Three pin 15A receptacle points are driven by distribution board directly, not fromany switchboard as other plug points. 2X4 mm2 wire is need for one such a point.
Switchboards are connected to distribution board via 1.5 or 2.5 mm2 wires and 4mm2 in case of very high loads (unusual for domestic purposes).
L
7/28/2019 EEE 314 Lecture 7 Drawing A
15/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Practice Section:
Draw Conduit Diagram and Switchboard connection Diagram for Example1:
2
L
3
L
4
L
L
L
L
S
S
T
S
F
FF
7/28/2019 EEE 314 Lecture 7 Drawing A
16/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Draw Conduit Diagram and Switchboard connection Diagram for Example2:
2
L
L
5
L
L L
L
S
S
T
S
F
FF
S
7/28/2019 EEE 314 Lecture 7 Drawing A
17/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Draw Conduit Diagram and Switchboard connection Diagram andDistribution Connection Diagram for Example 3:
Assignment:
1. Design a two or three room home by yourself. Place suitable electricalappliances on that design and have fittings and fixture layout, conduitdiagram layout and distribution connection diagram.
2. Give fittings and fixture layout, conduit diagram layout and distributionconnection diagram for assignment two figure.
3. Give fittings and fixture layout, conduit diagram layout and distributionconnection diagram for assignment two figure.
7/28/2019 EEE 314 Lecture 7 Drawing A
18/19
Prepared by: Md. Itrat Bin Shams (Sanin)
Lecturer, EEE, BUET.
Assignment 2 Figure:
F1
F3
K1
C1
TV1TS1
1SS1
SS2
C2 A1 3
4
A2
5
SL1 5A
6
7
L2
S115A
A2
ST2
7/28/2019 EEE 314 Lecture 7 Drawing A
19/19
Assignment 3 Figure:
F1
F2
F3
K1K1
C1
TV1TS1
SS1
2
SS2
C2 A1 3
4
SS3 A2
5
SL1 5A
A3
6
7
L1
L2
L3
L4
S1
15A
ST1
ST2
F4
C3
C4
A5
9
SS5
A2S2
15A
8
K3K4
SS4
10
L5L6
SL2 5A