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A-6
INSTALLATION
RANGER 250
A-6
6. Check and tighten the connections periodically.
• Loose connections will cause the output terminals to
overheat. The terminals may eventually melt.
• Do not cross the welding cables at the output
terminal connection. Keep the cables isolated
and separate from one another.
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AUXILIARY POWER RECEPTACLES
The auxiliary power of the RANGER 250 consists of
two 20 Amp-120 VAC (5-20R) duplex receptacles and
one 50 Amp 120/240 VAC (14-50R) receptacle. The
240 VAC receptacle can be split for single phase 120
VAC operation.
The auxiliary power capacity is 9,000 Watts Peak,
8500 Watts Continuous of 60 Hz, single phase power.
The auxiliary power capacity rating in watts is equiva-
lent to volt-amperes at unity power factor. The max
permissible current of the 240 VAC output is 35 Amps.
The 240 VAC output can be split to provide two sepa-
rate 120 VAC outputs with a max permissible current
of 35 Amps per output to two separate 120 VAC
branch circuits (these circuits cannot be paralleled).
Output voltage is within ± 10% at all loads up to rated
capacity.
The 120 V auxiliary power receptacles should only be
used with three wire grounded type plugs or approved
double insulated tools with two wire plugs. The current
rating of any plug used with the system must be at
least equal to the current capacity of the associated
receptacle.
NOTE: The 240 V receptacle has two 120 V circuits,
but are of opposite polarities and cannot be paralleled.
STANDBY POWER CONNECTIONS
The RANGER 250 is suitable for temporary, standby
or emergency power using the engine manufacturer’s
recommended maintenance schedule.
The RANGER 250 can be permanently installed as a
standby power unit for 240 VAC, 3 wire, single phase,
35 amp service. Connections must be made by a
licensed electrician who can determine how the
120/240 VAC power can be adapted to the particular
installation and comply with all applicable electrical
codes.
1. Install the double-pole, double-throw switch
between the power company meter and the premis-
es disconnect. Switch rating must be the same or
greater than the customer’s premises disconnect
and service over current protection.
2. Take necessary steps to assure load is limited to
the capacity of the RANGER 250 by installing a 40
amp, 240 VAC double pole circuit breaker.
Maximum rated load for each leg of the 240 VAC
auxiliary is 35 amperes. Loading above the rated
output will reduce output voltage below the allow-
able - 10% of rated voltage which may damage
appliances or other motor-driven equipment and
may result in overheating of the RANGER 250
engine and/or alternator windings.
3. Install a 50 amp, 120/240 VAC plug (NEMA Type
14-50) to the double-pole circuit breaker using No.
6, 4 conductor cable of the desired length. (The 50
amp, 120/240 VAC plug is available in the optional
K802R plug kit or as part number T12153-9.)
4. Plug this cable into the 50 Amp, 120/240 Volt
receptacle on the RANGER 250 case front.
CAUTION