Generac Power Systems 004701-0 ‹2.6.1 ELECTRICAL JUNCTION BOX, ‹2.6.3 GENERATOR AC CONNECTIONS

Section 2 – Installation

Recreational Vehicle Generator

•Wiring must be of adequate size, have approved insulative qualities and be properly supported.

•Conduit and wire openings into the generator com- partment (if used) must be vapor-sealed to prevent entry of flammable, explosive or poisonous gases into the vehicle.

‹2.6.1 ELECTRICAL JUNCTION BOX

Figure 2.13 – Generator AC Output Leads

REMOTE PANEL

CONNECTOR

500.2 [19 11/16"]

REF.

AC OUTPUT

HARNESS

Install an approved, square electrical junction box with a blank cover on the interior or exterior wall of the area planned for installation of the generator (NOT on the generator). Route the generator's AC output leads into this junction box through approved flexible conduit. This is the point of first termination for generator AC output leads.

‹ 2.6.2 WIRING

•Wiring should be of stranded copper to reduce the chance that vibration may cause breakage.

•Wire gauge size should be large enough to handle at least 115 percent of the installed generator's rated maximum current.

•Neutral conductors must be the same size as other leg wires.

•Route power supply conductors from generator AC output leads (white), (black) and the green ground wire through approved flexible conduit to the elec- trical junction box on the compartment wall.

If flexible metal conduit is used between the gen- erator and the compartment junction box, the con- duit end that terminates the compartment junction box must be vapor-sealed. Flexible metal conduit is NOT vapor tight along its entire length.

•From the junction box, route power supply wires through approved conduit to either (a) double-pole, double-throw transfer switch, or (b) approved iso- lation receptacle. Connecting to a transfer switch or isolation receptacle must prevent vehicle electri- cal circuits from being connected to two different power supplies at the same time (such as genera- tor and dockside power).

•Conductors must be rated 221° F (105° C) or must be of a larger conductor size.

‹2.6.3 GENERATOR AC CONNECTIONS

Generator AC output leads (BLACK) “hot” and (WHITE) grounded neutral come out of the generator as shown in Figure 2.13. There is also a green lead that connects to ground in the junction box of the recreational vehicle.

Leads BLACK to WHITE are protected against over- load by a 30-amp circuit breaker (CB1). Use this line-to-neutral connection separately to operate 120- volt, single-phase, 60 Hertz, AC loads requiring up to 3,400 watts (3.4 kW) of power.

Do NOT connect electrical loads in excess of any circuit breaker rating or problems with circuit breaker tripping will develop, which causes a loss of AC output. Also, do NOT exceed the gen- erator's rated wattage capacity. Add the watts or amperes of all lighting, appliance, tool and motor loads the generator will operate at one time. This total should be less than the unit's rated wattage/amperage capacity.

‹2.6.4 CONDUIT

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

•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.

‹2.6.5 ISOLATING DIFFERENT POWER SOURCES

Connections from the junction box must terminate in

adouble-pole, double-throw transfer switch (Figure 2.14). An alternate method for isolating different power sources is by using an isolating receptacle (Figure 2.15). Whichever method is used, be certain that both power sources are NOT connected at the same time.

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