Guardian Technologies 004270-3 Conduit, Power Supply Cord, Isolating Different Power Sources

Section 2 – Installation

QUIETPACT™ 75D Recreational Vehicle Generator

◆ 2.6.4 CONDUIT ◆ 2.6.6 GROUND FAULT CIRCUIT INTERRUPTERS

Route the connections between the generator and the junction box through approved, flexible conduit. The following general rules apply:

•All wiring, conduit, and interconnections must be installed in compliance with applicable codes, standards, and regulations.

•Cut wiring to the required length, and allow extra wire for junction box connections.

•Carefully prepare conduit ends to prevent sharp edges from cutting through wiring insulation.

•Route conduit so it does not interfere with genera- tor movement.

•If using metallic conduit, vapor-seal the end of the conduit where it enters the junction box. Do this because flexible metallic conduit is not vaporproof along its entire length.

•All openings in the generator compartment for the passage of wiring and conduit must be sealed and made vapor-tight.

NOTE:

Use a high-quality silicone rubber base sealant or other approved method (such as, explosion-proof fittings) to seal such openings.

◆2.6.5 POWER SUPPLY CORD

The power supply cord must comply with all applic- able codes, standards, and regulations. It must be large enough to handle the full amperage to which it will be subjected.

The National Electrical Code (NFPA 70, 551-7) requires that ground-fault circuit interrupters (GFCIs) be installed on all external and some internal electrical receptacles. Contact the manufacturer or dealer for recommendations.

◆2.6.7 ISOLATING DIFFERENT POWER SOURCES

Connections from the junction box must terminate in

adouble-pole, double-throw transfer switch (Figure 2.17). An alternate method for isolating different power sources includes using an isolating receptacle (Figure 2.18). Whichever method is used, be certain that both power sources are NOT connected at the same time.

DANGER

If the vehicle’s electrical circuits can be powered by any other source of electricity (such as, a “dockside” power receptacle), there must be no possibility of connecting the different power sources to the vehicle’s circuits at the same time. The dockside (utility) power source must be positively isolated from the vehicle’s circuits whenever the generator is operating. Failure to isolate the vehicle’s circuits from the dockside power supply when the generator is running may result in damage to the generator or in serious injury or death to dockside (utility) power workers due to backfeed of electrical energy. Installation and connection of the gen- erator must comply with NFPA 70, Article 551, and NFPA 1192 (latest editions).

Figure 2.17 – Transfer Switch Isolation Method

32 Generac® Power Systems, Inc.