Question about Generac 100 Amp 120/240-Volt Transfer Switch #RTSN100A3

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Installation manual/wiring diagram

Can you guide as to how to install the RTSN100A3 transfer switch. If you can mail a wiring diagram that would be much appreaciated.

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For these 4 control wires. How many watts do they consume. I have a generator 150ft away from the transfer switch, should these 4 18AWG control wires upsized?

No. They are fine. The voltage is 220. But the amperage is nearly nothing because its just for signaling the generator and switch when the powers out. I install, repair, and service generac products for a living.

Feb 10, 2011 | Generac 100 Amp 120/240-Volt Transfer...

1 Answer

I purchase a Generac/Centurion 10kw and came with a 50amp. transfer switch. What should I do to go up to 100amps.

This is not a DIY job unless you know what you are doing. But here is a link describing how it is done. I will not be responsible for any accident or damage done from installing it incorrectly. I would advise you to call a qualified electrician.

Oct 02, 2010 | Generac 100 Amp 120/240-Volt Transfer...

1 Answer

I need to know the connecttion between generator and transfer switch and utility line

three sets of connections are required. one set are your utility's lines, one set is your generator's the last set goes to your panelbox inlet breaker.

Oct 22, 2009 | Generac 100 Amp 120/240-Volt Transfer...

1 Answer

Generator Transfer Problem

There isn't much you can do with servicing the generator set or transfer switch unless you've got lots of experience in diagnoising semi-conductors and electronic components.

Depending on the age of the system, it would be benificial to have a qualified service tech take a look at it.

As an electrician, I've installed several back up generator sets in homes for customers and have had a few of these automatic transfer switches with intermittent operation issues. Sometimes it's the switch and other times it's the Generator that is causing the problems.

Hope this helps, and best regards!

Aug 07, 2009 | Generac 100 Amp 120/240-Volt Transfer...

1 Answer


As long as the hot water tank is no more than fifty feet from the panel, you will need 10/3 with ground wire, wire staples and a 30 amp double pole breaker. Be sure to purchase enough wire with about 4 feet extra to allow for connections.

Be sure to fill the water tank before turning on the power. To be sure it is full, run water through the nearby faucets, turning on the hot water faucets or both to be safe. If you fire up an empty hot water tank you will destroy the heating elements almost instantly.

Jul 10, 2009 | Generac 100 Amp 120/240-Volt Transfer...

3 Answers

Generac control wires

just 4. I install generac switches and generators

Apr 17, 2009 | Generac 100 Amp 120/240-Volt Transfer...

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