Generac 04077-01, 04109-1, 04079-1, 00789-1, 00844-1 manual Wiring Interconnections

Section 1 — Installation

Guardian Air-cooled Generators

1.10 GENERATOR AC CONNECTION SYSTEM

Figure 1.8 represents a single-phase, three-wire gen- erator AC connection system. The stator assembly in this system consists of a pair of stationary windings with two leads brought out of each winding. Each sin- gle winding can supply a 120-volt, 60-Hertz AC out- put. When the two windings are connected in series, a 240-volt, 60-Hertz AC output results. Stator AC out- put leads 11 and 44 are the two “hot” leads; the junc- tion of leads 22 and 33 forms the neutral lead.

Figure 1.8 – Generator AC Connection System

1.11 WIRING INTERCONNECTIONS

This generator uses an UNGROUNDED neutral line consisting of the junction of stator leads 22 and 33. Figure 1.9 and Figure 1.10 (Page 13) are interconnection diagrams of home standby electrical systems. Power voltage leads and transfer switch “signal” leads must be run in separate conduit.

All wiring must be the proper size, properly support- ed, of approved insulative qualities, and protected by NEC approved conduit. Use a length of flexible conduit between the generator and any rigid conduit.

NOTE:

See also “Emergency Circuit Isolation Method,” Section 1.8, and “Total Circuit Isolation Method,” Section 1.9, on Page 11.

◆1.11.1 6 KW, 8 KW AND 10 KW UNITS (NON-SA)

Complete the following AC power lead connections for single-phase units (Figure 1.9, Page 13):

1.Connect utility power supply leads to transfer switch terminals N1, N2 and the neutral lug.

2.Connect generator AC output leads from the gen- erator’s main circuit breaker (CB1) and the gen- erator neutral lug to transfer switch terminals E1, E2 and the neutral lug.

3.Connect circuit load leads to customer load, and to transfer switch terminals T1, T2 and the neutral lug.

◆ 1.11.2 SOUND ATTENUATED UNITS

The sound attenuated unit utilizes an internal 100-amp “V”-type transfer switch. The control and generator AC wires are prewired from the factory.

Complete the following AC power lead connections for single-phase units (Figure 1.10, Page 13):

1. Connect utility power supply leads to transfer switch terminals N1, N2 and the neutral lug.

2. Connect circuit load leads to customer load, and to transfer switch terminals T1, T2 and the neutral lug.

12 Generac® Power Systems, Inc.