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Discussion Starter · #1 ·
I just got a Reliance ProTran transfer switch installed at my house, and after figuring out I had to select 120/240v output to power both sides of the transfer box, now I have a slight problem. Everything works right except the circuit on the "F" connector. That circuit has a GFCI breaker on the house panel and it trips every time I switch from Line to Gen. Any idea why this is happening? Bonded neutral on the generator, perhaps?
 

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yea that can be normal.
unless some one has modified the gen it is floating on the chassis ground.

it all depends on the house grounds and how good the wiring is in the house.
so how is the gen getting its ground?
check the cord it needs to be a 4 wire cord from the gen to the power inlet.
and at least 8/4
 

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Discussion Starter · #3 ·
yea that can be normal.
unless some one has modified the gen it is floating on the chassis ground.

it all depends on the house grounds and how good the wiring is in the house.
so how is the gen getting its ground?
check the cord it needs to be a 4 wire cord from the gen to the power inlet.
and at least 8/4
The cable is four-wire 30A from the gen to the power inlet. I assume the genset gets its ground from the connection to the inlet andf then to the panel. The breaker works fine on line power, and I tried two four-wire 30A cables with the same result, so we think there is something we need to do on the genset itself. What do you mean by "...and at least 8/4"? I am an avionics tech, not a residential electrician.
 

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The cable is four-wire 30A from the gen to the power inlet. I assume the genset gets its ground from the connection to the inlet andf then to the panel. The breaker works fine on line power, and I tried two four-wire 30A cables with the same result, so we think there is something we need to do on the genset itself. What do you mean by "...and at least 8/4"? I am an avionics tech, not a residential electrician.
it is the wire length vs power drop or heating of the wire.
what you are looking for is fat wire to operate cool with no voltage loss.
 

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8/4 isn’t a requirement. Use a multimeter to check for continuity between ground and neutral at any of the plugs. If for some reason you have continuity then that’s your starting point. Separate the bond it technically should not have unless someone added it.
 

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Discussion Starter · #6 ·
it is the wire length vs power drop or heating of the wire.
what you are looking for is fat wire to operate cool with no voltage loss.
The current wire is correct and everything operates normally on line power. the problem is in the generator, not the wiring, transfer switch or cable from the generator to the inlet connector.
 

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Discussion Starter · #7 ·
8/4 isn’t a requirement. Use a multimeter to check for continuity between ground and neutral at any of the plugs. If for some reason you have continuity then that’s your starting point. Separate the bond it should technically should not have unless someone added it.
Why would the GFCI breaker work correctly under line power if this was the case??
 

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check all of your connections.
so when on gen set if you reset the gfci does it stay latched in or does it trip right back out?

you could have any thing from mouse damage to loose screws.
or even a bad gfci.
even though it works on grid power.

so is the gfci at the location of the outlet or a gfci breaker?
some gfci units trip out when you remove or reapply power!

try this turn off the breaker panel main breaker.
let it set for 30 min then set it back to on.
report back if the gfci trips out.

i would start with a new legrand gfci if it is just an gfci outlet.
 

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Discussion Starter · #9 ·
check all of your connections.
so when on gen set if you reset the gfci does it stay latched in or does it trip right back out?

you could have any thing from mouse damage to loose screws.
or even a bad gfci.
even though it works on grid power.

so is the gfci at the location of the outlet or a gfci breaker?
some gfci units trip out when you remove or reapply power!

try this turn off the breaker panel main breaker.
let it set for 30 min then set it back to on.
report back if the gfci trips out.

i would start with a new legrand gfci if it is just an gfci outlet.
Ok, I'm done with this braindead forum. Apparently reading skills are non-existent around here. Cya.
 
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