jameshowison
New Member
- Joined
- Jul 30, 2021
- Messages
- 184
I think I have a grasp of amperage ratings, but I'm confused about max voltage ratings for bus bars.
Unlike switches/disconnects/fuses I don't think that arcing is an issue for bus bars (or is it?)
I'm confused why wire generally seems to be rated up to something very high (like 600v) but bus bars are often rated much lower (like 50vdc or 32vdc)? Is this generally just a "tested up to" number? Or is there some property that limits this? If there is, why doesn't it apply to wire?
e.g., https://www.bluesea.com/products/2104/PowerBar_600A_BusBar_-_Four_3_8in-16_Studs which has 300V AC/48V DC
compared to
https://www.bluesea.com/products/1990/PowerBar_1000_-_8_3_8in_Terminal_Studs which just says 150V
Or
which shows 50VDC for the bus bar (see p7 of the PDF).
(Overall context is 48v nominal systems, where actual voltages are up around 58v, sometimes!)
Unlike switches/disconnects/fuses I don't think that arcing is an issue for bus bars (or is it?)
I'm confused why wire generally seems to be rated up to something very high (like 600v) but bus bars are often rated much lower (like 50vdc or 32vdc)? Is this generally just a "tested up to" number? Or is there some property that limits this? If there is, why doesn't it apply to wire?
e.g., https://www.bluesea.com/products/2104/PowerBar_600A_BusBar_-_Four_3_8in-16_Studs which has 300V AC/48V DC
compared to
https://www.bluesea.com/products/1990/PowerBar_1000_-_8_3_8in_Terminal_Studs which just says 150V
Or
which shows 50VDC for the bus bar (see p7 of the PDF).
(Overall context is 48v nominal systems, where actual voltages are up around 58v, sometimes!)