lmaruyama
Member
- Location
- Fremont, CA
Does changing the washer in the circuit breaker void the UL listing? We want to use Nordlock washers to secure connection.
nordlock washers for circuit breakers
- Thread starter lmaruyama
- Start date
- Status
- Location
- Massachusetts
I suspect ULs position is that they cannot say without field evaluation.
But that said, why would you want to do this?
But that said, why would you want to do this?
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
- Location
- Massachusetts
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
lmaruyama
Member
- Location
- Fremont, CA
Customer request. It may improve wire connection. We remove the washer that comes with breaker and replace with Nordlock to avoid lose connection over time
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
This a quite an expensive option/request. UL field evaluations are not cheap at all, prolly 5 digits minimum. Customer willing to pay?
What are the details if I may ask?
Size of breaker?
Which exact washer?
How many?
lmaruyama
Member
- Location
- Fremont, CA
This is for many of our panels, but mostly we have for Fuji ELCB type, <100A ea.
- Location
- Illinois
- Occupation
- retired electrician
If that is for the breaker to wire connection, it would get a red tag from me unless you could provide a letter from the breaker manufacturer or a field evaluation from an NRTL. Given the temperature and current cycling that is done when an electrical connection is evaluated by a testing lab, I am not sure you could even get a field evaluation.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
And who would pay for this? UL will prolly do it, but the cost........?
Nothing in the NEC allows this unless the AHJ drops the listing clause and that is prolly not gonna happen.
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