Note the following abbreviations : X is the full load current of the largest
appliance or circuit Y is the full load current of the second
largest appliance or circuit Z is the full load current of the remaining appliances
or circuits

Type of final circuit

Type of premises

Households

Small shops, stores, offices

Hotels, guest houses

Lighting

66% total demand

90% total demand

75% total demand

Heating and power

100% up to 10 A + 50% balance

100%X + 75%(Y+Z)

100%X + 80%Y + 60%Z

Cookers

10 A + 30% balance + 5 A for socket

100%X + 80%Y + 60%Z

100%X + 80%Y + 60%Z

Motors (but not lifts)

100%X + 80%Y + 60%Z

100%X + 50%(Y+Z)

Instantaneous water heaters

100%X + 100%Y + 25%Z

100%X + 100%Y + 25%Z

100%X + 100%Y + 25%Z

Thermostatic water heaters

100%

100%

100%

Floor warming installations

100%

100%

100%

Thermal storage heating

100%

100%

100%

Standard circuits

100%X + 40%(Y+Z)

100%X + 50%(Y+Z)

100%X + 50%(Y+Z)

Sockets and stationary equip.

100%X + 40%(Y+Z)

100%X + 75%(Y+Z)

100%X + 75%Y + 40%Z

Extracted
from The Electricians Guide Fifth Edition by John Whitfield Published by EPA PressClick
Here to order your Copy