schematic of manual transfer switch for 1990 - Printable Version

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+--- Thread: schematic of manual transfer switch for 1990 (/showthread.php?tid=158)

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schematic of manual transfer switch for 1990 - encantotom - 09-01-2012

hi all,

i put new relays in the manual transfer switch in my 1990. i also replaced the neon indicator lights. i thought having the info might help someone. you would have to verify that your setup is the same as mine was. i suspect that newell used the same setup for a while, but you would have to doublecheck yours. the old relays were no longer manufactured so the contactors i show below are the replacements for them.

here is the schematic of the transfer switch i sketched out after tracing the wires.

there are 2 different contactors used here. the 2 big ones and then an auxiliary smaller contactor that adds on.

i bought mine at grainger but they are available at other places.

the part numbers for them are as follows. you need 2 of each.

the big one is a

Brand SQUARE D
Mfr. Model # 8910DPA63V02

the little one is a

Brand SQUARE D
Mfr. Model # 9999D01

here are the grainger links to them.

https://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=5B097&op=search&Ntt=5B097&N=0&GlobalSearch=true&sst=subset

https://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=4B973&op=search&Ntt=4B973&N=0&GlobalSearch=true&sst=subset


tom

   

picture below is of the new contactors
   

the picture below this is the old contactors
   

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RE: schematic of manual transfer switch for 1990 - smagown - 05-04-2013

Where is the transfer switch located? I can't find mine.
Thanks,

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RE: schematic of manual transfer switch for 1990 - smagown - 05-04-2013

I found it. It is under a false panel in front of the main electrical panel in my rear closet . A Todd PS-275 automatic transfer switch.
Thanks,

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RE: schematic of manual transfer switch for 1990 - Floridian - 02-06-2025

Just wanted to say how much I appreciate this site to still be up and running, this can't happen with the FB groups. Last night, I think we had some power surge and while I do have surge protectors (Progressive Dynamics) something happen and while sleeping some relays started making some really weird noises and that woke us up. After checking what was happening I only had L1 coming and and working, turned everything off and back on again to hear an AWFUL humming on the back of the coach(driver side)

This morning I checked there after work and there is a transfer switch in there, I was super worried that I needed to start tracing back cables and all that and what do I find here, the exact same transfer switch that Tom changed YEARS ago so I won't have to fiddle with it like I thought I was going to be doing tomorrow.

Tonight, inverter and cooler weather out (no AC) will make me sleep calmly through the night until I can take this job tomorrow.

THANKS TOM FOR PUTTING THIS OUT THERE FOR THE REST OF US! THIS IS STILL HIGHLY VALUABLE IN 2025!

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