Is this legal?

[AaronHuang]

I have 40amp Rev breaker on a CTRE PDP

[ChuckDickerson]

Yes. Please reference R619. The REV breakers are allowed in the CTRE PDP. The only real restriction in the larger MX5 size Snap Action breakers are only legal in the CTRE PDP because they physically don’t fit in the REV PDH. But you can use the REV breakers in either up to the 40A where they physically fit.

[unident]

while yes, this is completely legal, p̶l̶e̶a̶s̶e̶ ̶e̶n̶s̶u̶r̶e̶ ̶t̶o̶ ̶u̶s̶e̶ ̶m̶a̶x̶i̶m̶u̶m̶ ̶o̶f̶ ̶3̶0̶A̶ ̶b̶r̶e̶a̶k̶e̶r̶s̶ ̶o̶n̶ ̶c̶h̶a̶n̶n̶e̶l̶s̶ ̶4̶-̶1̶1̶,̶ ̶p̶e̶r̶ ̶b̶u̶l̶l̶e̶t̶ ̶1̶.̶2̶ ̶i̶n̶ ̶t̶h̶e̶ ̶C̶T̶R̶ ̶p̶a̶n̶e̶l̶ ̶g̶u̶i̶d̶e̶ ̶

PDP%20User%27s%20Guide.pdf

based on what other users have said, yes this is completely legal, but you might get possibly worse performance, compared to what it was initially designed for. Waiting for CTR to change their documentation I suppose. Nothing within the user PDF suggests it is acceptable to use greater than 30A breakers on these channels when I read it.

[bovlb]

Chuck is obviously the last word, but I was surprised by this, given the fact that the manufacturer indicates these slots are intended for no more than 30A. After a little digging, I found Q25 from 2022:

Q25 Does R619 allow using Rev ATO breakers in the PDP?
Q: Specifically, can any breaker value of the Rev ATO breakers be used with the PDP, including the 40A breakers? The CTRE documentation for the PDP indicates that
the slots these breakers fit in are intended for 20A-30A breakers, however the ATO breaker page gives indications that a 40A breaker can be used in those slots but may
result in diminished performance (increased tripping). Clarity around the legality of this usage would greatly help teams!
A: Yes, !R619 permits using the REV 40A ATO breaker in the CTR Electronics PDP. CTR Electronics is in the process of updating their documentation.
( Asked by 2177 answered Jan 17th 22 )

[FrankJ]

I think it was more there was not an approved FRC 40A breaker for the small slots. Both CTRE and First quickly said it was Ok when the REV 40A breaker came out.

[marshall]

@FrankJ

Both CTRE and First quickly said it was Ok

I’m not certain CTRE ever said it was ok but FHQ did.

That being said… there was a wise dude at CMP who told me this past year “yeah, you’d use a penny if it was legal” and sure enough… I would.

[Zatack7]

Any piece of wire is a fuse if you don’t care about a specific fault current.

[Thor5090]

@marshall

That being said… there was a wise dude at CMP who told me this past year “yeah, you’d use a penny if it was legal” and sure enough… I would.

A few years ago the company that I work for was fined by OSHA for using 3/8" copper tubing in place of fuses on portable conveyors. The company that manufacturered the conveyors used the tubing for functional testing but were supposed to remove them before shipping it but didn’t and no one thought to check the conveyors disconnect.

[FrankJ]

In for a penny, in for a pound.