Branchcircuit protection instanttrip breaker Normal size A M

Branch-circuit protection instant-trip breaker. Normal size ___A Maximum size ___A Branch-circuit protection-inverse time breaker. Normal size ___A Maximum size ___A

Solution

As obtained from NEC 2014 Table 430.52

c) Branch circuit short circuit protection for instant trip breaker

Normal size 800A

Maximum size 1100A

d) Branch circuit protection for inverse time breaker

Normal size 250A

Maximum size 250A