Section 2 – Installation

Recreational Vehicle Generator

•Route conduit so it does not interfere with generator move- ment.

2.8BATTERY INSTALLATION

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

‹2.7.5 ISOLATING DIFFERENT POWER SOURCES

Connections from the junction box must terminate in a double- pole, double-throw transfer switch (Figure 2.18). An alternate method for isolating different power sources is by using an isolating receptacle (Figure 2.19). Whichever method is use, be certain that both power sources are NOT connected at the same time.

‹2.7.6 POWER SUPPLY CORD

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

‹2.8.1 RECOMMENDED BATTERY

Install a battery that meets the following requirements:

•The battery must be a 12-volt, automotive type storage bat- tery.

•For prevailing ambient temperatures above 32° F (0° C), use a battery rated 70 amp-hours and capable of delivering 400 cold-cranking amperes.

•For prevailing ambient temperatures below 32° F (0° C), use a battery rated 95 amp-hours and capable of delivering 400 cold-cranking amperes.

NOTE:

If the battery is to be used to power other vehicle accessories, as well as start the generator, a battery with a larger capacity may be needed.

‹2.7.7 GROUND FAULT CIRCUIT INTERRUPTERS

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

‹2.8.2 BATTERY CABLES

Using battery cables that are too long or too small in diameter may cause a drop in voltage, which causes starting problems. For the best cold weather starting, the voltage drop between battery terminals and the generator connection point should not exceed 0.12 volts per 100 amperes of cranking current.

Figure 2.18 – Transfer Switch Isolation Method

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