The maximum overcurrent protection (MOCP) is the maximum circuit breaker size that may be used to protect the WIRE and the equipment under anticipated fault conditions. The MOCP/MOP takes into account startup surges and component ageing. ▪ The selected breaker size must be more than MCA rating but less than MOCP value.
How do you calculate maximum overcurrent protection?
Maximum Overcurrent Protection (MOP)
In short, the basic MOP is calculated by multiplying the rated current of the largest motor times 2.25, and adding in all other loads of 1.0 amp or more that could be in operation at the same time.
What is overcurrent protection?
Overcurrent protection devices include circuit breakers and fuses. Overcurrent protection devices are meant to protect against the potentially dangerous effects of overcurrents, such as an overload current or a short-circuit current, which creates a fault current.
What is MCA and mop?
The MCA is the minimum wire size needed to guarantee that the wiring will not overheat under all operating conditions for the life of the product. The MOP is the maximum allowable circuit breaker size that will properly disconnect power to the equipment under any anticipated fault condition.
Is Fla same as MCA?
MCA is the minimum safe loading that conductors should carry. This 75 HP, 3-phase motor is used in a food processing plant near Kelowna, BC. FLA (Full Load Amps) is the amount of continuous current that a running motor will consume and what we use in our load calculations.
How do you calculate MOCP?
Maximum Overcurrent Protection (MOCP)
In short, the basic MOCP is calculated by multiplying the rated current of the largest compressor times 2.25, and adding in all other loads of 1.0 amp or more that could be in operation at the same time.
What is the difference between overload and overcurrent protection?
ANSWER: Overcurrent protection is protection against excessive currents or current beyond the acceptable current rating of equipment. It generally operates instantly. … Overload protection is a protection against a running overcurrent that would cause overheating of the protected equipment.
How does MCA calculate Fla?
Calculating the MCA requires other electrical information from the components in the circuit.
- Locate the name plate of the product to be wired. …
- Find the full load amps (FLA) of the unit’s largest motor. …
- Add the FLA of all the motors together. …
- Multiply the sum of the motor FLA ratings by 1.25.