Domestic Residential Load Calculation r

7/23/2019 Domestic Residential Load Calculation r

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ل ت

ت إ

:س ل

2006



ت ل ت .

ت ة أو ل (Dwelling Units) ت

ه إ ت ل إ ل ه و ، ن

ء ه ء ة و آ م و ، إ آ

أ آ و ، ة أو ل

إ وأة ي .

ر ل ن ي آ ت ه ول

إ ز ء آ و م ،أ ةر إ ي ء

إ ع لو ء آ .

؟ ة ي آ

ة 6 آ :-

وأ: ن ي و م ب :-

- رج و رة :3 وأ م أ 0.093 ) ..و(220- 3A

- ز ر إ1500أ ..(NEC 220.16(A) – 210.11(C))

- ص 1500أ ) 220.11( و آن و ،

ت ف ه آ و و ة ون ر ) NEC

210.52 (F) )

أ ، و و ل ه )ن ( ه آو

220.11آ أ آرة ل ع :-

ت و ن ة ن آ

أو100% 3000 أ .

35% 117000 أ 3000أ

25% .

ع )1(

و ة ة و ةر ن آ

أو100% 3000 أ .

35% .

ع )1(



: و ة أ أل -:آ) NEC220.15 -220.21(ب

أة نأ أ100%

أة نأ أ

100%

ة ه أن ذو ف و و م

آ ي و أ ي ف أ

)2. (

: ة ل أ ك : ب إ م أ

75% ن آ ذإ

4 آ أ و أ ة أ

أ ة و و ن ن وأDisposal) . NEC 220.17. (

) . NEC 220.15( و) . NEC 220.18( ت و.

) NEC 220.19( وأة

)3. (

: ب :5000 ة و وأ ت وآ ذإ آأ5000 ذ و وو ت ك أ222.18

ه أ و ،5000أ ) .4(

: ن ت ) ت (: و أ220.19 ي و

ول أ و ت أ أ و ت و إ ي ك

.

د: ت ي أ 1إ5

ول ر و ر 310.16.

: VA وأ و ر آ و KWز

ص ب ز ن آ ذ ، ) Name Plate( ر

و ل م و ، ل و و ب.

ل :1.

ة و

نأ

أ1500 ة يو م :-

آ ر و ى ر ي أ ك ز 240.

آ 10 آ ة ر وى و ت آ240.

ت آ 14 و ت آ120/240.

آ ة 4نو آ

و 4ة آ

ن ة آ2ز ر وى و ت آ120.

ت آ ز )Compactor (2/1 ن 120.

ل Disposalز 3/1 ن 120

و ن ة 240.

ه و إ ي وأ ز ة .



:-

وأ: ب .

- رج و رة

:3 م أ ==<1500X3=4500VA.

- ز1500أ ==<2X1500=3000VA

- ص 1500أ ==<1500VA

===<4500+3000+1500=9000

أو100% 3000==<3000X1=3000VA

35% 6000==<6000X0.35=2100VA

==<1=3000+2100=5100VA

: ة أ أل ب ز : آ 5 240ك

430.147و>==

==< أ ك ر )Full Load Current(=28A

==<VA=28X240=6270VA

ز ) : (10 ت و آ240

==<VA=10000VA

ذو ف و و م ة ه أن

==< أ

ز ف

==< 2=10000VA

: ة ل أ ب

آ ة 4نو آ==<4000VA

ن ة 2زو آ==<2000VA

ز آ ة 2/1و 120ن

430.147و>==

==< أ ر =9.8A

==<VA=120X9.8=1176VA

ن Disposal3/1ز 120

430.147و>==

==< أ ر =7.2A

==<VA=120X9.8=864VA

و ن ة 240



==<430.147و

==< أ ر =8A

==<VA=120X8=960VA

كإ م أ75% ن آ ذإ4 و ن ة آ أ و أ ة أ

==<)4000+2000+1176+864+960(X0.75=6750VA

==<3=6750VA

: ب : ه أ و5000أ

ول آو220.18ه ك نأ

100% و آ .

==<4=5000VA.

: ن ت ) ت . (

إ ت ل ه 14KW.

وع إ220.19ر و ، أ ت 1 ر ل KW

C 5%KW ت 12KWوو

27KW.

14KW==< ز2KW

2X5= %2X0.05=0.1

ة نأ لو ة 8000VA ت إ 12KW

==< ت 14KW:8000X1.1=8800VA.

==<5=8800VA

د: =5100+10000+6750+5000+8800=35650VA

==<I=P/V=35650/ 240=148.542A

310.16و>==

==< د 75 ده0 / 1AWG ي و

آ 150A.

ل :2.

ن نأ أ25 ة و آ ، ةو

1000 يو م

-: ة

ز )208V30.8A(- )0005W( – )12000VA(

آDisposal)1500VA( – ز ))4500W( – )4500Wن

إ ه آ ت 15500W.



ر م 120/208V.

وأ و

:-

وأ: ة و م ب

- رج و رة :1000X3VA=3000VA

- ز1500أ ==<2X1500=3000VA

- ص 1500أ ==<1500VA

ة و م ع=7500VA

==< م =25X7500=187500VA

100%أو 3000VA==<3000X1=3000VA

35% 117000 أ ==<117000X0.35=40950VA

25% 67500VA==<67500X0.25=16875VA

==< =60825VA=1

:لأ ة ب .

ز )208V30.8A(==<208X30.8=6406VA

7500KW==<7500VA

ذو ف و و م ة ه أن

==< ز ف أ

==<7500X25=187500VA=2

: ة ل أ ب

==<1200VADisposal==<1500VAن

آ )4500W== (<4500VAن

==<1200+1500+4500=7200

==<7200X25=180000VA=3

: ب .

)4500W== (< ة و آ أن 4500W م نأ ،

5000W إ ه ر آ220.18 ء آ .

==<5000VAX25=125000VA

ول آ220.18 ك ب نأ آ 23 و43

: = %35 – )0.5X) – 23((

==< ك 25 = %35 – )0.5X)25 – 23= ((34%



==<125000X0.34=42500VA=4

: ن ت ) ت . (

ت إ ه آ15500W

إ ت ل ه 15.5KW.

ول إ و ر220.19ع ، أ ت 1 ر ل KW

C 5%KW ت 12KW.27KWو

15.5KW==< ز3.5KW==<إ ب4KW

==<4X5= %20% ز

ول 220.19 نأ 25 ة و

40000VAإ ت

12KW

==< ت 15.5KW:40000X1.2=48000VA.

==<5=48000VA

: ع

=60825+187500+180000+42500+48000=518825VA

ب ر ==<I=VA÷)1.732X208(=518825÷)1.732X208= (1440A

إ و>== 310.16ع ه آ هك

ر ز ز تآ م

==<أ 3ز ت آ 800AWG آ آ

490A

==<3 ز تآ490X3=1470A

1440A

و إ3 ز ت آ800AWG



ول

ء آ

ت



310.16ول ص

60°C

(140°F)

75°C

(167°F)

90°C

(194°F)

60°C

(140°F)

75°C

(167°F)

90°C

(194°F)

TypesTW, UF

Types RHW,THHW, THW,

THWN,XHHW, USE,

ZW

Types TBS, SA, SIS,FEP, FEPB, MI, RHH,

RHW-2, THHN,

THHW, THW-2,THWN-2, USE-2,

XHH, XHHW,

XHHW-2, ZW-2

TypesTW, UF

Types RHW,THHW, THW,

THWN,

XHHW, USE

Types TBS, SA, SIS,THHN, THHW, THW-2,

THWN-2, RHH, RHW-2,USE-2, XHH, XHHW,

XHHW-2, ZW-2

Size AWG or

kcmil

COPPER ALUMINUM OR COPPER-CLAD ALUMINUM

Size AWG or

kcmil

18 – – 14 – – – –

16 – – 18 – – – –

14* 20 20 25 – – – –

12* 25 25 30 20 20 25 12*

10* 30 35 40 25 30 35 10*

8 40 50 55 30 40 45 8

6 55 65 75 40 50 60 6

4 70 85 95 55 65 75 4

3 5 100 110 65 75 85 3

2 95 115 130 75 90 100 2

1 110 130 150 85 100 115 1

1/0 125 150 170 100 120 135 1/0

2/0 145 175 195 115 135 150 2/03/0 165 200 225 130 155 175 3/0

4/0 195 230 260 150 180 205 4/0

250 215 255 290 170 205 230 250

300 240 285 320 190 230 255 300

350 260 310 350 210 250 280 350

400 280 335 380 225 270 305 400

500 320 380 430 260 310 350 500

600 355 420 475 285 340 385 600

700 385 460 520 310 375 420 700

750 400 475 535 320 385 435 750

800 410 490 555 330 395 450 800

900 435 520 585 355 425 480 900

1000 455 545 615 375 445 500 1000

1250 495 590 665 405 485 545 1250

1500 520 625 705 435 520 585 1500

1750 545 650 735 455 545 615 1750

2000 560 665 750 470 560 630 2000



220.18 ول ك



د 431.147ول م أ )(



ص 220.19ول ت ك



)220.19)ول

1. Over 12 kW through 27 kW ranges all of same rating. For ranges individually rated more than 12 kW but

not more than 27 kW, the maximum demand in Column C shall be increased 5 percent for each additionalkilowatt of rating or major fraction thereof by which the rating of individual ranges exceeds 12 kW.

2. Over 8¾ kW through 27 kW ranges of unequal ratings. For ranges individually rated more than 8¾ kW

and of different ratings, but none exceeding 27 kW, an average value of rating shall be computed by adding

together the ratings of all ranges to obtain the total connected load (using 12 kW for any range rated lessthan 12 kW) and dividing by the total number of ranges. Then the maximum demand in Column C shall be

increased 5 percent for each kilowatt or major fraction thereof by which this average value exceeds 12 kW.

3. Over 1¾ kW through 8¾ kW. In lieu of the method provided in Column C, it shall be permissible to add

the nameplate ratings of all household cooking appliances rated more than 1¾ kW but not more than 8¾kW and multiply the sum by the demand factors specified in Column A or B for the given number of

appliances. Where the rating of cooking appliances falls under both Column A and Column B, the demand

factors for each column shall be applied to the appliances for that column, and the results added together.4. Branch-Circuit Load. It shall be permissible to compute the branch circuit load for one range in

accordance with Table 220.19. The branch-circuit load for one wall-mounted oven or one counter mounted

cooking unit shall be the nameplate rating of the appliance. The branch-circuit load for a counter-mounted

cooking unit and not more than two wall-mounted ovens, all supplied from a single branch circuit and located in the same room, shall be computed by adding the nameplate rating of the individual appliances

and treating this total as equivalent to one range.

5. This table also applies to household cooking appliances rated over 13.4 kW and used in instructional programs.

Domestic Residential Load Calculation r

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