Guardian Technologies 004702-0, 004703-0, 004704-0, 004705-0, 004706-0, 004707-0 ‹ 6.7.2 Wiring

Section 6 – Installation

Recreational Vehicle Generators

‹6.7.1 ELECTRICAL JUNCTION BOX

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.

‹6.7.2 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.

•If neutral conductors are used, they must be the same size as other leg wires.

•Route power supply conductors from generator AC output leads T1 (red), T2 (white), T3 (black) and the green ground wire through approved flexible conduit to the electrical junction box on the com- partment 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.

‹6.7.3 GENERATOR AC CONNECTIONS

Generator AC output leads T1 (red), T2 (white) and T3 (black) come out of the generator as shown in Figure 6.14. Leads T1 (red) and T3 (black) are “hot,” while T2 (white) is the grounded neutral lead. There is also a green lead that connects to ground in the junction box of the recreational vehicle.

Line T1 (red) to T2 (white) is protected against overload by a circuit breaker (CB1). Use this line- to-neutral connection separately to operate 120-volt, single-phase, 60 Hertz, AC loads. Line T3 (black) to T2 (white) also is protected against overload by a cir- cuit breaker (CB2). Use this line-to-neutral connec- tion separately to operate similar loads. However, be sure the total unit load does not exceed the maximum rating of the generator. The neutral line (T2, white) on all units is a grounded neutral.

Figure 6.14 – Generator AC Output Leads

T3

T2

T1

Green (Ground)

Do NOT connect electrical loads in excess of any circuit breaker rating or problems will develop with circuit breaker tripping, which causes a loss of AC output. Also, do NOT exceed the gener- ator'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.

‹6.7.4 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.

‹6.7.5 ISOLATING DIFFERENT POWER SOURCES

Connections from the junction box must terminate in

adouble-pole, double-throw transfer switch (Figure 6.15). An alternate method for isolating different power sources is by using an isolating receptacle (Figure 6.16). Whichever method is used, be certain that both power sources are NOT connected at the same time.

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