Wire Recommendations/Sizing - Generac Power Systems Stationary Emergency Generator Installation Manual

Operation
The load wires consist of wires run between the generator main
circuit breaker and the transfer mechanism, and a neutral wire. See
"Wire Recommendations/Sizing" for load wire sizing information.
3.6.2 BLOCK HEATER CONNECTIONS
Block heater kits can be purchased at the authorized dealer.
The block heater will not function unless it is plugged into the AC
outlet and the outlet is properly wired to an AC power supply (by
the installer) (Figure 3.7).
Figure 3.7 — AC Outlet for Block Heater and Battery
Charger (to be wired by installer)
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3.7 WIRE RECOMMENDATIONS/
SIZING
(SEE TABLE 4)
3.7.1 CONTROL WIRING
Control system interconnections on a Nexus Series controlled
generator consist of N1 and N2, T1, NEU, and leads 23 and 194.
Control system interconnection leads must be run in a conduit that
is separate from the AC power leads. Recommended wire gauge
size depends on the length of the wire:
Max. Cable Length
460 feet (140m)
461 to 730 feet (223m)
731 to 1,160 feet (354m)
1,161 to 1850 feet (565m)
3.7.2 LOAD WIRING
Power source and load line conductors must be properly sup-
ported, of approved insulative qualities, and of the correct wire
gauge size.
When connecting power, source, and load lines remove surface
oxides from stripped ends of conductors with a wire brush. Apply
joint compound to stripped ends of conductors. Tighten terminals
to the specified torque value, as given in the owner's manual for
the transfer switch.
Recommended wire gauge size depends on the current rating of
the generator main circuit breaker.
Recommended Wire Size
No. 18 AWG.
No. 16 AWG.
No. 14 AWG.
No. 12 AWG.