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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What are the pros and cons of adding a second ground rod at the "Alt Power" location In this diagram?

My question is whether or not I should add a second ground rod at the generator location? This is shown as the "Alt Power Source (2024)" box in this diagram. Please recognize that this ...
Tim Whitmore's user avatar
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29 views

Proper grounding with a generator interlock kit in my sub-panel

My main panel/meter can is outside, but I want to install the interlock kit on the sub-panel inside my house to make it easier to adjust the loading. That part is easy, but my concern is how to ...
Eddie L's user avatar
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2 answers
203 views

What are the Pros & Cons of a generator transfer switch vs an interlock?

I'd like to be able to power essential circuits with a portable generator. If local code allows, I could use either a manual generator transfer switch (I'm looking at the Reliant Controls ProTran), ...
zwiebelspaetzle's user avatar
1 vote
0 answers
70 views

Grounding question: Honda eu7000is generator connected through PG&E backup power transfer meter

Earlier this year PG&E installed a free backup power transfer meter at our California property (info sheet here). Using the cable supplied with the meter, it connects our Honda eu7000is inverter ...
Dave Millman's user avatar
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1 answer
107 views

Feeding inlet power into a generator transfer switch

I'm installing a manual transfer switch for a generator in my basement. The transfer switch box requires that the inlet connect come from the bottom of the box. However, I will be running the wiring ...
InfestedTaco's user avatar
0 votes
2 answers
83 views

Interlock for GE PowerMark plus subpanel [closed]

I have a GE TL412R1P subpanel and would like to use a 70 amp breaker for the inverter and another 30 amp for the generator as transfer switch to either accept power from a 30 amp max split phase power ...
Rick's user avatar
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2 answers
134 views

Emergency generator transfer switch feeding main and remote subpanel [closed]

My main panel is 200 amp in my garage, with a 100 amp circuit breaker feeding a panel in the basement. The basement panel powers my electric water heater and well pump, as well as my entire ...
David S's user avatar
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1 answer
169 views

Is it safe to plug 110v outlet to inverter input, and inverter output to the inletbox

I have installed the 10 breakers transfer switch, so if the power is out I can just connect the generator to the inlet box. I dont want to disturb my neighbors at night so I am planning to install ...
sharon's user avatar
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1 answer
253 views

EZ Generator Switch with Generac GB1000 and gas furnace

Can I use an EZ Generator Switch as a transfer switch with a Generac GB1000 battery and a gas furnace (Bryant 340aav). If so, should it be setup as bonded neutral or floating neutral (I'm guessing it'...
Felix's user avatar
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1 answer
300 views

50 amp inlet box to transfer switch

I have a Reliance 50amp transfer switch which I am connecting to a 50 amp inlet box. My understanding is that 6 awg copper wire should be run from the inlet box to the transfer switch. The question I ...
Martin 's user avatar
9 votes
4 answers
3k views

Does the NEC allow a sub panel to be powered by a generator and an automatic transfer switch?

I plan to install a sub panel next to my main panel. Mainly because as I do electrical upgrades, I'm accumulating more circuit breakers. Since I need one anyway, I'd like to be able to power it with a ...
Mike Gray's user avatar
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3 votes
2 answers
2k views

How to wire in a backup generator?

Growing up in the mountains of CA the power would go out damn near every time it snowed so my dad finally had enough and got a 4k or 5k generator when i was young. When the power would go out the ...
rasmukri's user avatar
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8 votes
6 answers
2k views

How can I ensure a level 2 EV charger will not run while my standby generator is running?

I have a standby generator with an automatic transfer switch. It is set up to power all the circuits in my house. It does not have high enough wattage to power an EV charger in addition to the current ...
Jared's user avatar
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0 votes
1 answer
318 views

Supplying 30 amp 4 prong transfer switch from type B output on power station

My home has a Connecticut Electric EmerGen Switch #10-7500 with a 4 prong 30 amp locking power inlet. I also have a Goal Zero Yeti 1500X Power Station (a lithium battery and inverter). Is it possible ...
daxelrod's user avatar
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1 answer
155 views

What is the best way to caulk this?

I got a generator installed yesterday and noticed the caulking needs to be replaced around the meter box. The transfer switch was installed so close to the meter I have no idea how to strip and re-...
amrog's user avatar
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1 vote
3 answers
338 views

Is it a code violation to use a 50A plug/outlets as a transfer switch alternative? If so, is there an NEC compliant option?

Edit--this appears to be a duplicate of this question, which remains unanswered. Summary: I'm trying to find a way to feed a 50A load panel from two different sources, each with an existing neutral/...
ConsumerBot734277's user avatar
4 votes
2 answers
609 views

Need dead time before transfer back to utility from Generac

I have a 25kW liquid cooled Generac for whole house, using transfer switch RXSW200A3 (200A, service rated). Is there a way to get a "dead time" before the transfer back to the utility ...
relayman357's user avatar
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2 answers
1k views

Can't plug my Bluetti AC300 into the grid and turn on AC output on the AC300 when plugged into Reliance ProTran2 manual transfer switch

I have a Reliance ProTran2 manual transfer switch plugged into my Bluetti AC300 battery backup system which has a floating ground. The AC300 is supposed to be used as a UPS backup system and pass grid ...
Leon's user avatar
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-1 votes
1 answer
213 views

16 circuit load center generac to with briggs and stratton

I have a Briggs and Stratton standby generator model 040301 7kw and want to use a Generac automated standby transfer switch with 16 circuit Load center 50amp, part 0j0391. Is this ok?
Richard Harris's user avatar
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0 answers
695 views

Portable Generator with Manual Transfer Switch Troubleshooting

When I hook up a generator to my house via a transfer switch it does one of the following: Trips the main breaker on the generator immediately. It does this when the generator is neutral bonded. Or, ...
DIYoutube's user avatar
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3 votes
1 answer
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Generator automatic transfer switch + main panel not configured as sub panel

I bought a house in Massachusetts (USA) that was built around 2009. It has a generator with a service rated automatic transfer switch (ATS) connected to a main panel that is set up as a main panel (...
kr4sh2's user avatar
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2 votes
2 answers
972 views

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

I am planning for a Generator based power back up. Need to have the back up to run the sump pump in case the there is a power outage in Spring when the snow melts making water flow in my sump pit and ...
Asker123's user avatar
2 votes
1 answer
222 views

30a outdoor generator inlet box to transfer switch

I have a 8K watt running (10k peak) tri fuel generator with a cord to a 30a inlet box, which is on the exterior of my home. Can I run a single 35ft run of UF 10/3 straight from my inlet box to the ...
Mike's user avatar
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0 votes
1 answer
2k views

Transfer switch- only connect hot lines for circuit

I have a Generac automatic standby generator with a 8 circuit transfer switch. I was wondering if because the neutral bars in the main breaker panel are directly connected to the neutral bar in the ...
Carl's user avatar
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0 votes
1 answer
154 views

My Light switch and outlets in a different location and light switches no longer work after replacing a dimmer switch?

I replaced a dimmer switch bc it was buzzing at the switch. I got the new dimmer switch to work but I no longer have power to my outlets and other light switches in the same circuit. Some background ...
Charissa Maher's user avatar
0 votes
3 answers
3k views

Adding Transfer Switch to Main Breaker with no available ground/neutral spots on bus

I am installing a 10 circuit reliance manual transfer switch. I need to install the ground to the ground bar and the neutral to the neutral bar. However, both grounds and neutrals are mixed in my ...
Cameron Morissette's user avatar
1 vote
2 answers
3k views

To use any generator with the house inlet, may one leave the generator ground wire unconnected in the inlet?

tl;dr: To facilitate using any generator with the house inlet, regardless of transfer switch type or generator neutral-ground-bond status, may one leave the generator ground wire unconnected in the ...
Triplefault's user avatar
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0 votes
3 answers
337 views

Can 2 different portable generators be wired to off-grid cabin's single panel - not used simultaneously but rather one or the other at different times

We have an off-grid cabin. Currently we have a Champion 7500 watt dual fuel generator powered with propane that is connected by a 120/240v cord directly into the cabin's electrical circuit panel. The ...
Tom Thacher's user avatar
1 vote
0 answers
190 views

OK to start a house circuit wire with a plug, to plug into circuit panel outlet or generator breakout box?

Eventually I plan to put in a subpanel and transfer switch or circuit-breaker interlock for several house circuits to run from my generator, with all permitting and inspections. But as a temporary ...
Triplefault's user avatar
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0 votes
2 answers
7k views

Wiring a 100 Amp Transfer Switch to main panel

I have a 100-Amp 240-Volt Outdoor Non-Fused Transfer Switch and would like to wire it to the main panel outside. My main panel has 3 breakers (Oven [25 Amp], A/C [50 Amp], & House [100 Amp]) my ...
Robert S.'s user avatar
1 vote
0 answers
94 views

Breaker Size to feed a transfer switch from my 200 amp main

Hi I'm adding a 200 capable transfer switch that will draw power from my 200 amp main. I will move some circuits from the main to the transfer switch. I know I wouldn't be moving all the circuit over, ...
brucewol's user avatar
1 vote
1 answer
3k views

400amp service entrance 200amp transfer switch

My local big box retailer has a decent priced 22kw lp generator/200amp transfer switch deal going right now. I'm considering purchasing it but I'm unsure on the correct way to go about my situation. I ...
D A's user avatar
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1 vote
2 answers
755 views

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

I would like to participate in net-metering until I have a solar array large enough to disconnect from the grid entirely. However, for various reasons, I am going to have an undersized solar array ...
user227963's user avatar
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0 votes
1 answer
423 views

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

I'm planning a generator installation (Generac PowerPact 7.5kw) with an ATS with 8 circuits (i.e. Not whole house). I want 240v hot water to always be on when on utility power. When the ATS switches ...
Matt's user avatar
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0 votes
2 answers
3k views

Connecting a Honda 7000iS portable generator to a transfer switch

I recently purchased a Honda EU7000iS generator (manual) to power our house when the power goes out. The house came with a transfer switch but I'm unsure which cord to buy to connect the two. Can ...
Mike Buss's user avatar
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6 votes
3 answers
3k views

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

I purchased a used Generac 10kva with a transfer switch and am in the final stages of getting things setup. The generator itself has a 45a breaker on it and I've got 6 ga wire running from it to the ...
andyknas's user avatar
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2 votes
1 answer
3k views

One transfer switch, two main panels

Can a single manual transfer switch be wired to two main panels (both from same meter but they do not feed each other)? Specifically, if desired breakers cannot be consolidated into one panel and ...
Joel Kranz's user avatar
1 vote
1 answer
1k views

Can I wire a 200amp auto transfer switch from one metered service to two 100amp panels?

I have one metered service feeding two 100 amp panels separately one to the house then one to the garage. Can I install a 22kw generator and use one transfer switch for both 100 amp panels?
user123307's user avatar
0 votes
3 answers
173 views

Determining generator loads

See related question here: Using portable generator with transfer switch I live on a property with 600 AMP service (2x200AMP service to home, 1x200AMP service to workshop / barn). The home and barn ...
cyclops's user avatar
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0 votes
1 answer
325 views

Using portable generator with transfer switch

See related question here: Determining generator loads I live on a property with 600 AMP service (2x200AMP service to home, 1x200AMP service to workshop / barn). The home and barn are new ...
cyclops's user avatar
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0 votes
1 answer
2k views

Installing a generator transfer switch on an ITE Pushmatic panel

I have purchased a transfer switch,the Reliance Controls Corporation 31406CRK 30 Amp 6-circuit. The panel in question is a ITE Pushmatic, like the one in the picture except it has two main breakers on ...
Jo Roman's user avatar
1 vote
2 answers
217 views

Feeding single circuit from two different subpanels (with interlock)

I have a main panel and a critical loads sub-panel fed by a PV inverter + battery backup. I need to avoid overloading the normal capacity in the critical loads panel (50A), and I'm already at a ...
jcoleman's user avatar
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1 vote
2 answers
689 views

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

I am attempting to gather the supplies needed to setup a secondary panel for a backup generator. The generator itself is a Westinghouse 7500 model that explicitly states that the neutral bonding has ...
Dom's user avatar
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0 votes
1 answer
1k views

Generator Transfer Switch for 2 Panels

I'd like to install a Transfer Switch (10 circuits) from the Generator to the two panels I have. Each panel is rated at 200 amps. If I turn off the main breaker in one of them, the other panel still ...
Raj's user avatar
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2 votes
1 answer
884 views

Recommendation for mounting transfer switch to vinyl sided exterior wall

I need to mount a Generac automatic transfer switch to my house beneath the meter base. The construction of the wall I need to mount to is (from outside inwards): 30 yr old vinyl siding (for which I ...
peinal's user avatar
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0 votes
0 answers
873 views

Can I install 2 Reliance control pro Tran 2 transfer switch 10 circuit on same panel?

I believe I have a sub panel because there is a breaker at the meter to shut off power. There is also a separate neutral bar from the ground bar in my breaker box. Assuming I have that correct, onto ...
MZawg's user avatar
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0 votes
1 answer
922 views

Isolator switch for electric generator to change from bonded to floating neutral

I have an electric Power generator and have a manual transfer switch to use a Power generator when the utility power is out. So the electric power generator is used as is with bonded neutral when used ...
Rick's user avatar
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0 votes
1 answer
271 views

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

How can I use a single pole breaker in Transfer Switch to replace a Double Pole GFI breaker in box for bedroom lights and GFI Master Bathroom outlets? It trips every time I turn it on through transfer ...
Dave's user avatar
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1 vote
2 answers
2k views

Must a generator be connected permanently to the transfer switch?

I will soon be purchasing a 15K watt, 50A generator and an exterior 200A on/off/on transfer switch. Nothing is an issues except for connecting generator to transfer switch cabinet. Must a male/female ...
mrcaptainbob's user avatar
0 votes
1 answer
345 views

Installing a transfer switch

I too have a Generac 5500 Generator. It is safely positioned on the side of my home, a double - wide on block foundation , on a concrete pad. I have a super clean (even vacuumed) crawl space. I want ...
dday's user avatar
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