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Nameplate Max OCPD
- Thread starter JES2727
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raberding
Senior Member
- Location
- Dayton, OH
- Occupation
- Consulting Engineer
i think not
MCA is minimum
MOCP is maximum
MCA is minimum
MOCP is maximum
MCA is minimum
MOCP is maximum
Yes, I know.
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
If you are limited to standard values, not using adjustable equipment, you would end up using a 15 breaker, to comply with both min and max, and maybe suffer some nuisance trips.
lielec11
Senior Member
- Location
- Charlotte, NC
- Occupation
- Electrical Engineer (PE)
The specs for a glycol chiller indicate MCA 11 & MOCPD 18. Is it permissible to use the next standard size CB (20A)?
Who is the manufacturer? Sounds fishy to me as 18A is not a standard fuse or CB rating. If the minimum circuit ampacity is 11A, I'd most likely go with a 15A OCPD. However, try and get a cut sheet and do your own calculation to get the MCA and MOCP values.
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
Who is the manufacturer? Sounds fishy to me as 18A is not a standard fuse or CB rating. If the minimum circuit ampacity is 11A, I'd most likely go with a 15A OCPD. However, try and get a cut sheet and do your own calculation to get the MCA and MOCP values.
This sounds curious. I have never seen a product marked with an MCA and max OCPD where the max OCPD did not correspond to a standard value.
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