11 votes

8500 W generator with L14-30 plug.. How to access full capacity for house?

Don't worry about it Breakers have a certain latitude to them, and can run slightly above rating for a short time. That provides for motor starting and short term overloads. You're not supposed to ...
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11 votes

What's the best way to connect transfer switch and sub panel?

Get a bigger subpanel You appear to have an automatic transfer switch, and the switching happens there. The 10? 12? space subpanel is just an ordinary run of the mill subpanel. It isn't special, it ...
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5 votes

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

There can only be one point in the system where neutral and ground wires are joined, and this is usually in the main panel. Therefore, you must lift the bond from the generator, or disconnect the ...
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5 votes

Generator tripping GFCI breakers in main panel

That's to be expected. The neutral from the circuit is going through the GFCI breaker, but the hot is coming from the generator. The GFCI sees this as an imbalance, since there's no current flowing ...
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  • 129k
5 votes

setting up a secondary panel with generator (Wire Guidance needed)

GFCI is no-go with some transfer switches There are some very terrible, very expensive transfer switches which have a row of switches, 6, 8 or 10 of them, and individual fuses or mini-breakers near ...
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5 votes

What's the best way to connect transfer switch and sub panel?

Perfectly normal to have breakers that exceed the input. All circuits are not fully loaded all the time. When on generator power, not all circuits connected to the generator panel need to be switched ...
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  • 139k
5 votes

What are benefits of a subpanel over pre configured 6 , 8 or 10 circuit Transfer Switch Kits? which one is better for Portable Generator?

Cost On cost, those transfer switches typically cost between $350 and $550 depending on number of switches. A 12-space subpanel is around $40, interlock $30, 2 breakers for the interlock $10 each, ...
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4 votes

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

It sounds like the winds knocked one leg of your service down in a way that kept your inverter from powering up the dead leg -- most inverters are line-interactive, and won't feed into a dead or ...
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4 votes

Can a transfer switch be powered by two separate generators?

Connecting 2 different generators that can not be synced will cause disaster to the wiring and the smaller or cheaper generator if any 240v loads are connected. Using a common neutral you are taking ...
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  • 100k
4 votes
Accepted

setting up a secondary panel with generator (Wire Guidance needed)

This is permanent wiring, so you need to use cable (or individual wires in conduit), not cordage The wiring from an inlet box to a transfer switch is permanent building wiring, so cordage such as the ...
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4 votes
Accepted

Can I have net-metering with an ATS between utility and batteries and diverse power inputs (solar, wind, generator) behind the batteries?

As to your direct questions, Is this a valid and code-compliant configuration for safe, utility compliant net metering ? Have I described anything (other than the car hookup) that doesn't work the ...
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3 votes

200A service to 100A transfer switch?

Yeah, that's how you do that. A 200A main panel which contains a 100A feeder breaker to A xxxA subpanel via a 100A transfer switch. The 100A feeder breaker protects the transfer switch. Assuming the ...
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3 votes
Accepted

Add sub panel from transfer switch

You can tap this What you want to do here is replace the existing set of 3-way splice connectors that tap the feeder for the surge protector with 4-ways, and then use the newly opened connector-ports ...
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3 votes

100 amp transfer switch for 125 amp home

No, you can't do that A 100A manual transfer panel has a 100A breaker for the utility-side input; as a result, it would be a "bottleneck" if you put it inline with your service, restricting the whole ...
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3 votes

connecting to a transfer switch

For a generator of that size, the primary connection would not be through those convenience outlets, but rather directly to lugs sized for the cables required. If this wasn't the primary use of the ...
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  • 2,410
3 votes

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

Many generators (especially those for permanent installation) have optional automatic transfer switch assemblies. If the backup generator is permanently installed, then I'd recommend buying its ...
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3 votes
Accepted

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

You have two choices. 1) Remove the jumper on the generator, and connect it to the transfer switch as you had planned. But have to put the jumper back on if you ever want to use the generator ...
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  • 19.4k
3 votes

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

Yes, this appears to be doable, but the parts required aren't quite standard The good news is that this actually appears to be possible using inexpensive, readily obtainable parts; the only bad news ...
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3 votes
Accepted

Recommendation for mounting transfer switch to vinyl sided exterior wall

The first option that comes to mind is U-strut. (Channel strut or C-channel) Photo from fireequip.com.au The first two struts would be mounted vertically on studs with at least three points. Use ...
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  • 13.3k
3 votes
Accepted

Using portable generator with transfer switch

Yes Sure, that ought to be possible. That looks like an automatic transfer switch. It was set up on only one of the two 200A feeds to your house. Presumably whoever wired your house was ...
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3 votes

Default an appliance to off (no power) when on generator power and on when on utility power

What you need is a critical-loads subpanel This is an ordinary subpanel, in which the critical-load circuits are permanently moved. (this isn't as annoying as it sounds). The ATS automatically ...
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3 votes
Accepted

400amp service entrance 200amp transfer switch

Forget about buying this thing. It's an "impulse buy", and that does not work for engineered products like whole-house generators and automatic transfer switches. It's an Automatic transfer ...
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3 votes

What are benefits of a subpanel over pre configured 6 , 8 or 10 circuit Transfer Switch Kits? which one is better for Portable Generator?

The big problem with Reliance 6 circuit style beside lack of flexibility is they create a rats nest in the panel. But your bigger issue is Federal Pacific, see Wikipedia: After the 1979 sale of ...
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2 votes
Accepted

manual transfer switch - 2 main panels

Same meter, then yes, you can, But -- A wise man will not use all the circuits in a new breaker box. The day you find the one you forgot about, there is no place for it to go. The prewired tail on ...
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  • 2,207
2 votes

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

I will join longneck, you need to give to give this one to a pro. If you do not understand about back-feeding a circuit, already, it is too easy to kill someone. I say this without exaggeration. ...
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  • 2,207
2 votes

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

Not sure about the wind issue. However, checking connections at box for corrosion and having power company check voltage are good places to start. Something similar happened to me. Very odd to have ...
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  • 21
2 votes

Sharing my 240V 30amp between two dryers

No. The wiring and the breaker are sized for the needs of a single dryer. To connect several would create a situation where overload is likely, or at least a possibility. A possible workaround, with ...
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  • 107k
2 votes

Generator tripping GFCI breakers in main panel

The decision to use a GFCI breaker was a correct one. The problem is this style of transfer switch is about as "Bangkok wiring" as you can get - the worst series of code violations I have ever seen ...
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2 votes
Accepted

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?

A DPDT air conditioning relay should do the trick House 2 is connected by default. When House 1 calls for water, it "takes over" and powers the well itself. Air conditioning relays are rated at ...
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2 votes

Single pole breaker in Transfer Switch trips on transfer to GEN position every time but only on Master Bedroom circuit, 5 others OK

You can't put GFCI, AFCI or MWBC circuits on transfer switches. I'm referring to the flimsy 6, 8 or 10 circuit switches that let you flip each circuit to utility or gen individually. And you have ...
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