8
OPM-136/D
ELECTRICAL CONNECTIONS
GROUNDING
Proper grounding of your generator is application
dependent. Carefully evaluate your planned use of your
generator to understand which grounding you require.
If you are not sure what to do, contact a competent
professional to assist you. The NFPA 70 250:34-35 are good
technical references.
STANDARD PORTABLE GENERATOR
Your WINCO portable generator ships with a bonded
neutral. You can safely use this generator without external
grounding as long as all loads are powered through the
receptacle panel.
VEHICLE-MOUNTED GENERATOR
Your WINCO portable generator ships with a bonded
neutral. When mounted to a vehicle to safely distribute
power it is necessary that the generator frame is bonded
to the vehicle frame. The generator should only supply
equipment that is cord and plug connected through
receptacles mounted on the generator or the vehicle.
PERMANENTLY INSTALLED GENERATORS
This WINCO portable generator ships with a bonded
neutral and overcurrent protection. NFPA 70 refers to this
as a “separately derived system.” When connecting it to a
building a transfer switch specifically designed for GFCI and
bonded neutral generators is required.
CAUTION:
Only qualified electricians should install electrical wiring.
Wiring must conform to all applicable national, state,
and local codes. (Reference: National Fire Protection
Association Manual No. 70, National Electrical Code.)
DANGER: PERSONAL INJURY:
A manual transfer switch must be installed to separate the
generator and the commercial power lines. The switch
must isolate the generator from the commercial power
lines and the load when the generator is on standby, and
must isolate the commercial power lines from the load and
the generator when the generator is supplying power. See
the following diagrams.
A properly rated and installed double throw manual power
isolation transfer switch must be used with a standby
generator. The transfer switch isolates the load from the
power line and allows you to safely operate your loads
without endangering the power line repair crew. See
diagram on page 8.
The load, connected to the normal terminals of the transfer
switch, is energized by the normal power line when the
switch is in the normal position. The generator, connected
to the emergency terminals of the switch, furnishes power
when the switch is in the emergency mode position.
There are two ways to install a manual transfer switch. The
first shown on the left side of the diagram on page 8, is to
install the switch between the watt-hour meter and the
normal distribution panel. As with any system you must
install an entrance rated breaker before the manual transfer
switch. The manual transfer switch must in all cases be
equal to or greater than the rating of the entrance rated
breaker.
The second way to install the system is to purchase and
install an emergency distribution panel and move the
circuits you wish to back up to the new distribution panel.
In this case the manual transfer switch only has to be
sized to the amperage of the circuit breaker in the main
distribution panel that is feeding it. See the right hand
drawing of the diagram on page 8.
Before deciding which system to install, first determine
which loads you can safely run on your PTO generator and
the cost of buying a large manual transfer switch versus
the cost of a smaller switch and the additional distribution
panel.
PLUG KIT
The bag contains an instruction sheet, 2 plug bodies, four
contacts, two handle and the hardware to assembly the
disconnect plug. You will need to purchase the appropriate
length of fine stranded copper wire for your application
in order to complete the assembly of the disconnect plug.
Your application and local code will determine the type
of wire used. WINCO’s recommended wire size is given in
each plug kit.
If you require different inserts or contacts for local code,
WINCO has a variety of different inserts and contacts
available.
Contact the factory at 507-357-6831 for pricing.
Single Phase
120/240V
Three Phase
120/208V & 120/240V
Three Phase
277/480V
