Questions tagged [transfer-switch]

This is for transfer (generator) switches or interlocks, used with portable or hard-wired backup (standby) generators. Manual and automatic transfer switches are included, as well as breaker interlocks and inverter transfer systems.

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Connecting 240 volt generator to Main Panel

I read previous posts that explained that the Sub Panel has a separate connection for ground and separate for neutral, while the Main Panel does not separate the ground & neutral - this is exactly ...
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81 views

Does the amp size have to match?

My home has three bathrooms in it and the outlets for all three are combined off one 20 amp breaker in the panel. Do I have to use one of the 20 amp breakers on the transfer switch or can I use one of ...
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Transfer switch worked but only to half the house, used to work fine. Any ideas? Thanks

We have a generac 20k generator and auto transfer switch. It has worked well for 3 years, but now when the power goes out it only switches over half the house. Any suggestions on troubleshooting would ...
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58 views

1 generator + multiple ATSes: how can I install this to Code without unobtanium?

I want to supply standby power to both units in a separately metered duplex from a single permanently installed generator. The cheapest way to do this is a pair of bog-standard ATSes and a smallish ...
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81 views

Ground wires: Do I have this right?

I have 200A load center with a solid bare #6 ground wire tied to a ground rod. Ground/Neutral are bonded in the box. Then run stranded #6 (does it have to bare?) to the 100A auto transfer switch. ...
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51 views

Breaker Feeding a Transfer Switch

I have 200A service, but I want to add a whole house generator (GENERAC 17k) that has a 100A transfer switch. I plan to use a seperate 100A load center after the transfer switch for the backed up ...
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1answer
46 views

200A service to 100A transfer switch?

I have 200A service but, I want to add a whole house generator (GENERAC 17k), but my transfer switch is only 100A. Can I add a 200A subpanel (NEMA 3R 12-space with 200A main) on the outside of the ...
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1answer
91 views

I have a buried wire for a generator in my shed. Is there a safe way to reverse the feed to power the shed?

My current setup: Main panel has 60A 240 breaker that feeds Generator subpanel which has 10 circuits on it. The Gen Feed to the subpanel comes from buried 10-3 in my shed. That works well for running ...
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1answer
112 views

Manual Transfer Switch to power Main panel and Sub panel circuits

I had installed a Reliance model 31410CRK manual transfer switch, which has 10 individual circuits. I happen to have a Main panel, and a Sub panel which are a few feet apart. The Sub panel was ...
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1answer
36 views

can an indoor Transfer Switch be used on the other side of the wall as an outdoor service entrance and main panel?

Can an indoor Transfer Switch be used on the other side of the wall as an outdoor service entrance and main panel? The concept is: The outdoor service entrance is wired through the wall to the SE ...
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179 views

Two Breaker panels, one transfer switch?

I have two breaker "panels", one is a 200 amp panel for everything in the house, and a separate one (with a different meter) that is just for my electric cold water heater, right next to the other ...
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59 views

How to figure out max Watt rating for transfer switch?

We bought a home with a transfer switch installed (seems old, can't find any documentation for it anywhere on the internet). I'm trying to buy an appropriate generator, but am not sure how high of a ...
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43 views

What Automatic Transfer Switch can switch between parallel sources without a priority setting so as to run a well pump from either of two homes?

We have two homes sharing a single well. The other homeowner and I want to change our water system so that we each have our own Pressure Tank and we can each run the well pump with power from our own ...
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1answer
87 views

Add new main load center for EV charging

I need to add an EV level 2 charger. Among other reasons, I just overloaded the garage circuit, frying a GFCI outlet when charging my BMW i3 and golf cart at the same time. I'd like the wiring to be ...
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1answer
232 views

Add sub panel from transfer switch

I'd like to add a subpanel to add a couple circuits (Extra inverter Mini Split ACs, well pump, etc.) but my main interior panel is full and recessed in concrete. I added a manual transfer switch from ...
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462 views

100 amp transfer switch for 125 amp home

A local electrical shop tried to sell me a GE 100 amp transfer switch. My main electrical panel breaker is 125 amps. Would this be ok?
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1answer
1k views

Electrical question on floating neutral generator for emergency use

There is tons of information on "bonded neutral" and "floating neutral" generator wiring to transfer switch. However, I have one question I cannot find the answer. I recently bought a Reliance ...
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1answer
180 views

Bring portable generator in through automatic transfer switch

I currently have a portable generator, an inlet, and an interlock on the main panel to backfeed the panel. I am moving over to an automatic transfer switch with a standby generator. However, as a ...
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1answer
3k views

Generator tripping GFCI breakers in main panel

I recently had some electrical work done on my home to bring it up to code - there was no GFCI protection in the kitchen or bathroom when we bought the house, so our electrician fitted GFCI breakers ...
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1answer
79 views

Can a transfer switch be powered by two separate generators?

I have two portable generators, a Honda 2000W and a cheaper Pulsar 2000W as a backup. They're very similar in terms of overall construction, and I wanted to see if I could combine them to power our ...
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409 views

Troubleshoot Reliance transfer switch ACE side

When switched to LINE all circuits work. When switched to GEN, only circuits BDF work. ACE goes dead. I tested ACE with a volt meter and a clamp multimeter. Circuit A, for example draws 3A when on ...
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2answers
1k views

Sharing my 240V 30amp between two dryers

We are running a clothes dryer in the lower level of our home. We are installing a washer and dryer on our main level. Can I split the power feed between both dryers and what can I use and where can ...
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1answer
179 views

Testing a furnace transfer switch, watt meter shows extremely low usage

I just installed a Reliance furnace transfer switch model TF151W to my main circuit panel. I tried to test it by running an extension cord from another outlet to the transfer switch. I put the P3 ...
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86 views

connecting to a transfer switch

I have a 35KW Wacker diesel generator. It has 3 x 240V 3 prong - 10, 20 and 30 amp service. it also has a 4 wire 3 prong 125/250 locking (center ground) outlets of 50 amp. My question is how do I ...
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2answers
128 views

What's the best way to connect two seperate generators to a well pump?

I need to have a generator run 240 volts to a well pump, and want it switched off when the generator is started. I also want a second (back up) generator that can be switched on if/when the main ...
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2answers
894 views

Solar panels and batteries as primary, grid as backup with auto transfer switch [closed]

I've been toying around with this idea and I'm not sure if it's feasible. I live in an area where the power company has recently adjusted rates to make grid-tied net metering rooftop solar ...
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1answer
629 views

Can I use a switch to toggle the neutral bonding on a generator?

I am in the process of attaching a 2-Pole transfer switch to my breaker panel and powering it by a 7500W generator. The generator is neutral-bonded-to-ground. I understand I have to disconnect this in ...
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2answers
2k views

Half of my lights and oulets are not working after heavy winds?

We have solar panels and mains power. Last night was very windy; we heard quite a few bangs from outside and thought it might be the wires getting knocked together. Woke up this morning and we have ...
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1answer
1k views

manual transfer switch - 2 main panels

I have 2 main panels, each 150 amp, each connected to meter. I'm installing a Reliance transfer switch (model 3006HDK). All instructions show how to wire circuits from a single main panel. Can I ...
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1answer
1k views

How should I hook up my generator to a manual transfer switch?

I have a couple of questions about hooking up a generator to a manual transfer switch and I'm really hoping somebody with knowledge can help guide me here. The idea is I will have an exterior weather-...
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3k views

Do unswitched neutral and ground wires need to pass through a transfer switch?

I'm installing a manual transfer switch to feed a 240V subpanel from either generator or the main panel. No devices other than the main panel are bonded. Since the neutral is not switched, can I ...
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4answers
15k views

What do I do with the neutral and ground when wiring a transfer switch?

I know there are a lot of questions about wiring a generator to a home electrical panel, but I can't find the answer to the questions that I have. I would like to wire a generator that has the ...