Section 2 – Installation
•Never tee the generator engine exhaust pipe into the vehicle engine exhaust piping. This causes excessive back pressure on the generator engine. Also, water from one engine can damage the other engine.
•Plan exhaust system installation carefully. Comply with all appli- cable codes, standards and regulations.
2.7ELECTRICAL CONNECTIONS
Be sure to read the "Generator AC Connection System" section.
The following general rules apply to electrical connections in a recreational vehicle:
•Qualified electricians who are familiar with applicable codes, standards and regulations should install electrical wiring.
•The wiring should comply with codes, standards and regula- tions. The National Electrical Code (NFPA 70), and state and local codes apply.
•Switches and circuit breakers should be of a type approved for use in recreational vehicles and must be mounted and installed to prevent damage from road shock.
•Wiring must be of adequate size, have approved insulative qualities and be properly supported.
•Conduit and wire openings into the generator compartment (if used) must be
Recreational Vehicle Generator
2.7.3 GENERATOR AC CONNECTIONS
Generator AC output leads T1 (red), T2 (white) and T3 (black) come out of the generator as shown in Figure 2.17. 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.
Figure 2.17 – Generator AC Output Leads
2.7.1 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.
2.7.2 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 compartment wall.
•If flexible metal conduit is used between the generator and the compartment junction box, the conduit end that terminates the compartment junction box must be
•From the junction box, route power supply wires through approved conduit to either (a)
(b) approved isolation receptacle. Connecting to a transfer switch or isolation receptacle must prevent vehicle electrical circuits from being connected to two different power supplies at the same time (such as generator and dockside power).
•Conductors must be rated 221° F (105° C) or must be of a larger conductor size.
Line T1 (red) to T2 (white) is protected against overload by a
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 genera- tor'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.
2.7.4 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 junc- tion box connections.
•Carefully prepare conduit ends to prevent sharp edges from cutting through wiring insulation.
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