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Old 06-07-2011, 09:57 AM   #1
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Custom wiring a generator to a transfer switch

Hi -

I have a Coleman generator - PowerBase Series, Model PM 0542000.01. It is 2250 Watts, 120 Volts, 18.75 Amps, single phase that I want to hook up to a Reliance 30216A transfer switch. The transfer switch has 6 switches and is rated for 120/240 volts 240 volts are achieved by using switch 3 and 4 tied together. I'm going to de-couple those and only use the circuits as 120 volts.

The transfer switch has 4 wires for input Green (ground), White (neutral), Red and Black.
The generator has 2 standard 3-prong outlets that you would normally plug an extension cord into.

My question is: I'm going to plug 2 extension cords into the two plugs on the generator, so how do I wire the outputs from the two plugs on the generator to power the transfer switch? I think it's like this:

A) Connect ground from plug 1 to ground from plug 2 then connect this to the Green (ground) wire on the transfer switch.
B) Connect neutral from plug 1 to neutral from plug 2 then connect this to the White (neutral) wire on the transfer switch.
C) Connect the Hot from plug 1 to the Black wire on the transfer switch.
D) Connect the Hot from plug 2 to the Red wire on the transfer switch.

Is that right? Does anyone see a problem with doing it this way?

Thanks in advance!!
- robojoe_fl


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Old 06-07-2011, 10:39 AM   #2
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You do not have a 240 genset.
Yoou will only have 120 volts at the panel.


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Old 06-07-2011, 04:57 PM   #3
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You may have only one cord and plug for this transfer switch. Connect both the red and black hot lines of the transfer switch unit to the black wire of the power cord (hot prong of the 120 volt plug).

If the wiring in the transfer switch and also your power cord is 12 gauge or thicker, you may get a 20 amp plug for this power cord.
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Last edited by AllanJ; 06-07-2011 at 05:03 PM.
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Old 06-07-2011, 08:01 PM   #4
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Thanks for the input

Thanks for replying guys. Connecting both red and black in the transfer switch to the hot from a single extension cord seems to be the way to go...
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Old 06-08-2011, 12:36 AM   #5
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Also you may want to put a warning sticker on the generator panel stated " no 240 volts " or " 120 volts only " one of the two will meet the requirement to forewarn someone else that you do not have 240 volts in there so in case someone try to hook up a 120/240 volt generator and use diffrent cord or other means and not have to cause a short circuit due you bridge one set.

The answer will be based on NEC ( National Electrical code ) or CEC ( Cananda Electrical code ) or ECF ( Electrique Code France )
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custom wire , generator , transfer switch

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