Generac — Connecting Power Source and Load Lines
Installation · Transfer mechanism terminal lugs
From a Generac service manual — check it applies to your exact model before use.
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Before you start
- Supply voltages are extremely high and dangerous. Contact with such high voltage power supply lines causes extremely hazardous, possibly lethal, electrical shock.
- Use a torque wrench; do not overtighten or damage to the switch base could occur.
Procedure
- Turn OFF both UTILITY (NORMAL) and EMERGENCY (STANDBY) power supplies.
- Remove surface oxides from cable ends with a wire brush.
- Connect UTILITY (NORMAL) power source cables to switch terminals N1, N2, N3.
- Connect EMERGENCY (STANDBY) source power cables to switch terminals E1, E2, E3.
- Connect customer LOAD leads to switch terminals T1, T2, T3.
- Connect neutral conductors of UTILITY, EMERGENCY and LOAD to the neutral block.
- Apply corrosion inhibitor to ALUMINUM conductors and wipe away excess.
- Tighten terminal lugs to torque values on decal inside the door.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Conductor size range 100 A: #6-2/0 AWG
- Conductor size range 200 A: #4-400 MCM
- Maintain at least 1/2 inch electrical clearance for 100-400 amp circuits
Source: Generac service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.