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DANGER
Do not connect the ground wire to any pipe
that carries a flammable or explosive substance
– FIRE or an EXPLOSION may result.
Proper grounding helps protect personnel against
electrical shock in the event of a ground fault condi-
tion in the generator or in connected electrical devic-
es. In addition, grounding helps dissipate static elec-
tricity that often builds up in ungrounded devices.
Figure 2.2 – Generator Grounding Lug (typical)
2.6
GENERATOR AC NEUTRAL
CONNECTIONS
The manufacturer uses an UNGROUNDED AC neu-
tral. Grounding is recommended only at the main
service entrance. If the neutral wire is grounded and
one of the phase loads becomes grounded, the exces-
sive current opens the load circuit breaker or col-
lapses the generator field. The actual result depends
on the electrical characteristics of the particular
installed generator.
2.7
TRANSFER SWITCH START SIGNAL
CONNECTIONS
If the generator is to be installed with an automatic
transfer switch, such as a GTS-type switch, it is nec-
essary to connect the two-wire start control system.
Connect the two-wire start signal from the automatic
transfer switch to the automatic start connection,
which is located in the lower center of the AC con-
nection panel (see Figure 2.3). Match wires 178/0 and
183 in the transfer switch to 178/0 and 183 on the
terminal strip in the connection box. The conductors
for the two-wire start circuit must be in their own
conduit.
Section 2 – Installation
Standby Generator Set
Figure 2.3 – Start Signal Connections
Automatic Start Connection (Wires 178/0 and 183)
2.8
BATTERY INSTALLATION
Standby generators installed with automatic
transfer switches will crank and start automati-
cally when NORMAL (UTILITY) source voltage is
removed or is below an acceptable preset level.
To prevent such automatic start-up and pos-
sible injury to personnel, do not connect battery
cables until certain that NORMAL source voltage
at the transfer switch is correct and the system
is ready for operation.
Storage batteries give off explosive hydrogen
gas. This gas can form an explosive mixture
around the battery for several hours after charg-
ing. The slightest spark can ignite the gas and
cause an explosion. Such an explosion can shat-
ter the battery and cause blindness or other
injury. Any area that houses a storage battery
must be properly ventilated. Do not allow smok-
ing, open flame, sparks or any spark producing
tools or equipment near the battery.
Battery electrolyte fluid is an extremely caus-
tic sulfuric acid solution that can cause severe
burns. Do not permit fluid to contact eyes, skin,
clothing, painted surfaces, etc. Wear protective
goggles, protective clothing and gloves when
handling a battery. If fluid is spilled, flush the
affected area immediately with clear water.
Do not dispose of the battery in a fire. The
battery is capable of exploding.
Do not open or mutilate the battery. Released
electrolyte can be toxic and harmful to the skin
and eyes.
DANGER
9
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