MCA / MROPD

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jimatwork

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I have a job with a Daikin roof top unit. The MCA IS 108 and the MROPD is 100 I know MCA=1.25 (motor rated current + heater current) and MOP=2.25 X rated current of largest motor + other motor loads +all heater loads. So what is MROPD it's rated less than MCA on nameplate.
 

GoldDigger

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I have a job with a Daikin roof top unit. The MCA IS 108 and the MROPD is 100 I know MCA=1.25 (motor rated current + heater current) and MOP=2.25 X rated current of largest motor + other motor loads +all heater loads. So what is MROPD it's rated less than MCA on nameplate.
AFAIK, a properly computed and labelled MROPD (maximum required/recommended overload protective device?), would necessarily be greater than or equal to the MCA.
Sounds like somebody goofed.
 
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