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Old 06-17-2016, 09:59 AM   #1
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Automatic Transfer Switch

Hi new to this rv'ing. We accidentally plugged into 220 and blew our Todd power switch PS245L, I know that Todd is out of business and we are trying to find a replacement. the problem is we have a 4 pole switch and the only ones we can find our 3 pole. There are 13 connectors in the housing, its a 120/240 60Hz 1 phase 50 A/Pole time delay. Any suggestions Please!!
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Old 06-17-2016, 10:19 AM   #2
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Welcome to iRV2 .

Sorry I can't help with your question .
My transfer switch is also a Todd , so I'm here to gather info in case I'm ever in need of replacement .
I'll have to check my manual ; for info on the 4 pole vs 3 pole ; to see if I'll have the same replacement issues.
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Old 06-17-2016, 10:24 AM   #3
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Quote:
Originally Posted by lisarich View Post
Hi new to this rv'ing. We accidentally plugged into 220 and blew our Todd power switch PS245L, I know that Todd is out of business and we are trying to find a replacement. the problem is we have a 4 pole switch and the only ones we can find our 3 pole. There are 13 connectors in the housing, its a 120/240 60Hz 1 phase 50 A/Pole time delay. Any suggestions Please!!

These guys build great transfer switches:

http://escotest.jimdo.com/electrical...sfer-switches/

Call them up & give them you particulars and I'm sure they can help you. The specs on your switch are not out of the ordinary. The Todd switches were not well thought of so if nothing else was hurt, maybe it's a blessing. While you are doing this, put a Progressive EMS in line before the switch.
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Old 06-17-2016, 10:29 AM   #4
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You've learned an expensive lesson. It sounds like your RV has 50 amp service. That includes two 50 amp hot leads of 120 v each and a common ground. The two hots are 180 out of phase, so their is the potential for 240 v, but RVs are usually wired to only use the two 120 v legs separately.


Any 50 amp ATS will replace the one you have. I'd also add a Progressive Industries EMS to prevent future problems. It doesn't allow connection to the RV to connect unless power is correct and within spec. Many campgrounds are under wired for today's RV energy hogs, it's just a good idea to protect your 'home' from surges, low voltages, mis-wired pedestals, etc.

As you've learned, never plug into a home outlet, even if the outlet looks like your plug fits, it's probably wired for home 240, not RV 120.
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Old 06-17-2016, 10:42 AM   #5
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So what do we do with the extra wires, all 13 connectors have wires in them. If we switch to a 3 pole where do all the wires go?
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Old 06-17-2016, 10:57 AM   #6
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Is your RV 50 amp (4 prong plug) or 30 amp? (3 prong plug)

50 amp service has 4 wires from the generator, 4 wires from the shore cord, and 4 wires going to the breaker box. Not sure what a 13th wire is for, you'll have to look at a wiring schematic for the original ATS.

30 amp service is 3 sets of 3 wires, or 9 large conductors. That's why I assumed yours is a 50 amp RV.

You can't install a 30 amp ATS in a 50 amp RV, it would require major rewiring of the whole 120 v system.
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Old 06-17-2016, 11:15 AM   #7
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Old 06-17-2016, 11:24 AM   #8
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sent pic four wire 50 amp
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Old 06-17-2016, 11:26 AM   #9
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Her is the story on RV power

http://www.rvtechmag.com/electrical/chapter3.php

Here is a layout of the 2 services

With that, you will know what service you have.
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Old 06-17-2016, 11:30 AM   #10
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It looks like you have 50 amp service from the shore cord, 50 amp service to the breaker panel, but only 30 amp service from the generator, thus the two white 'hots' connected to one terminal.

Unless you really understand the system, it would be a good idea to have a pro install a new ATS. The wiring is pretty straightforward, but I'm not comfortable trying to coach you on how to do it over the 'net.

I did a Google search of your ATS, I could find no schematics that show that model, a number of them that can replace it, but no 'how tos' on doing the wiring change over.
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Old 06-19-2016, 02:02 PM   #11
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I have a nearly new progressive industries PC52 for sale. $75.00 plus shipping.
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Old 06-20-2016, 04:08 AM   #12
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Try here for a replacement:

https://rvpartsexpress.com/product/5...-switch-wlugs/
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Old 06-20-2016, 06:12 AM   #13
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Transfer switch

We found a company in Ohio that rebuilds transfer switches and sent it to them. I'll let everyone how how much and if it works. Thanks for your help
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