Installation Guide

ManualsBrandsGenerac ManualsGeneratorsQT Series 80,000-Watt Liquid-Cooled Standby Generator

21 21 21

¥ Unless otherwise specifically permitted in the NEC, the over current protection for conductor types marked with an ¥ shall not exceed 15 amperes for No.

14, 20 amperes for No. 12, and 30 amperes for No. 10 copper; or 15 amperes for No. 12 and 25 amperes for No. 10 aluminum and copper-clad aluminum

after any correction factors for ambient temperature and number of conductors have been applied.

SIZE TEMPERATURE RATING OF CONDUCTOR SIZE

60° C 75° C 90° C 60° C 75° C 90° C

(140° F) (167° F) (194° F) (140° F) (167° F) (194° F)

TYPES TYPES TYPES TYPES TYPES TYPES

TW¥, UF¥ FEPW¥ TA, TBS, SA TW¥ RH¥, RHW¥ TA, TBS

RH¥, RHW¥ SIS, FEP¥ UF¥ THHW¥ SA, SIS,

AWG THHW¥ FEPB¥ THW¥ THHN¥ AWG

kcmil THW¥ RHH¥, RHW2 THWN¥ THHW¥

THWN¥ THHN¥, THHW¥ XHHW¥ THW2, THWN2

XHHW¥ THW2, THWN2 USE¥ RHH¥, RHW2

USE¥, ZW¥ USE2, XHH USE2

XHHW¥ XHH, XHHW

XHHW2, ZW2 XHHW2, ZW2

COPPER ALUMINUM OR COPPER CLAD ALUMINUM

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 85 100 110 65 75 85 3

2 95 115 130 75 90 100 2

1 110 160 150 85 100 115 1

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

2/0 145 175 195 115 135 150 2/0

3/0 165 200 225 130 155 175 3/0

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

250 215 255 290 170 205 230 250

300 24 285 320 190 230 255 300

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 42 475 285 340 385 600

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

TABLE 4 — ALLOWABLE AMPACITIES OF INSULATED CONDUCTORS RATED 0-2000 VOLTS, 60° TO 90° C (140° TO 194° F).

NOT MORE THAN THREE CONDUCTORS IN RACEWAY OR CABLE OR EARTH (DIRECTLY BURIED), BASED ON

AMBIENT TEMPERATURE OF 30° C (86° F) (REFERENCE NEC TABLE 310-16)

Operation