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Generac — An open circuit condition

For these Generac models: 389/206/163cc, 410cc, GP1800, GP3250, GP5000, GP5500, GP6500, GP7000, GP8000.

Applies to: Generac Gp1800, Generac Gp3250, Generac Gp5000, Generac Gp5500, Generac Gp6500, Generac Gp7000, Generac Gp8000

Before you start

  • Note: The resistance of stator windings is very low. Some meters will not read such a low resis­ tance, and will simply indicate CONTINUITY.
  • Note: Refer to Figure 4 in Section 1.3 for illustra­
  • NOTE: All figures are approximate. See data label

Procedure

  1. A short circuit between windings
  2. on ammeter may be used to measure current flow.
  3. Add up the total wattage of all electrical devices to be connected at one time. This total should NOT be greater than the generator's wattage capacity.
  4. The rated wattage of lights can be taken from light bulbs. The rated wattage of tools, appliances and motors can usually be found on a data label or decal affixed to the device.
  5. If the appliance, tool or motor does not give watt­ age, multiply volts times ampere rating to determine watts (volts x amps = watts).
  6. Some electric motors, such as induction types, require about three times more watts of power for starting than for running. This surge of power lasts only a few seconds when starting such motors. M ake sure to allow for high starting wattage when selecting electrical devices to connect to the generator: 1. Figure the watts needed to start the largest motor. 2. Add to that figure the running watts of all other con­ nected loads.

Source: manual:GP Series Service Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.