4 August 2013

MCB and Wire Selection Chart For Domestic loads

Following Chart gives wattage of different Loads and MCB rating and wire size:

*This is indicative




For Main incomer like MCB/MCCB/SFU selection:
First calculate total connected load using individual equipment wattage as given above,then find out total load current using given formula.
This load current gives main incomer rating.

Note:
1.While calculation you should consider diversity factor and power factor of Loads.
2.Add 10% extra for future expansion depending upon the situation.

Read more: MCB Selection Guide