Filter
Top Products
31
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.
2.7 ELECTRICAL 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 vapor-sealed to prevent entry of flammable,
explosive or poisonous gases into the vehicle.
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 installa-
tion 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 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 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.
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
T3
T2
T1
Green
(Ground)
Line T1 (red) to T2 (white) is protected against overload 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 3,600 watts (3.6 kW) of power. Line T3 (black) to
T2 (white) also is protected against overload by a 20-amp circuit
breaker (CB2). Use this line-to-neutral connection 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.
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.
Section 2 – Installation
Recreational Vehicle Generator