Table 6.2  Allowance for diversity


Note the following abbreviations : 

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 Press Click Here to order your Copy.