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What is the meaning of 10kA in MCB?

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What is the meaning of 10kA in MCB?

Breaking Capacity
MCB Breaking Capacity: Breaking capacity can be defined as the maximum level of fault current which can be safely cleared. It is written as in numerals like in in example it is 10000. It means it 10000A = 10kA. It means that it does not allow fault to get it’s peak and trip before that.

What is 6k and 10k in MCB?

6kA or 10kA denotes short circuit interrupting capacity of the MCB. When there is a fault in the circuit downstream of MCB, there is possibility of such high current flowing through MCB.

How can I check my current MCB rating?

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Branch Circuit-5 Current as per NEC =(0.42+0.16)+125\%(0.65) =0.57+0.82=1.39Amp. Type of Load=Lighting Type. Class of MCB=B Class. Size of MCB=6 Amp.

How do you calculate tripping current?

How to Calculate Circuit Breaker Trip Settings

  1. Look for the amperage notation on the breaker switch. This will generally be 15 or 20.
  2. Multiply the amps by the volts.
  3. Apply the same calculation to 240-volt circuits.
  4. Check the wattage for all electrical fixtures and appliances on the circuit.

What is the kA rating of MCB?

kA rating of an MCB or an MCCB is the maximum current it can safely interrupt in case of a short circuit. If the current goes beyond this value, the circuit breaker could be damaged. kA rating is known as the short circuit withstand capacity or ultimate breaking capacity of a circuit breaker. It is denoted by Icu.

What does 20KA mean?

20KA is the amount of short circuit current that the breaker can withstand for 3 seconds without any damage. 12.5KA is the amount of short circuit current that the breaker can withstand for 1 sec without any damage.

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What is kA rating of MCCB?

How much load can 32 amp MCB take?

Calculate Size of Main ELCB & Brach MCB of Distribution Box

Size of MCB/ELCB
Current (Amp) Lighting Load MCB/ELCB (Amp) Heating/Cooling/Motor-Pump Load MCB/ELCB (Amp)
25.0 32 32
32.0 40 40
40.0 45 45

What size MCB for a ring main?

Ring circuits are normally fed with a 30 or 32 amp fuse or MCB, but if feed is supplied through a 4mm cable then the spurs could also be feed with 30 or 32 amp fuse or MCB.

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