E2 Commercial Service Load Calculations 2

Question 1

What is the unit lighting load per square foot for office occupancies per NEC Table 220.12?

Accepted Answer

3.5 VA/sq ft

Answer

NEC Table 220.12 specifies 3.5 VA per square foot as the unit lighting load for office occupancies.

Question 2

Per NEC 220.44, what demand factor applies to the portion of non-dwelling receptacle load that exceeds 10 kVA?

Accepted Answer

50%

Answer

NEC 220.44 permits a 50% demand factor on non-dwelling receptacle loads exceeding the first 10 kVA.

Question 3

What is the unit lighting load per square foot for a mercantile (retail store) occupancy per NEC Table 220.12?

Accepted Answer

3.0 VA/sq ft

Answer

NEC Table 220.12 lists 3 VA per square foot as the unit lighting load for mercantile occupancies.

Question 4

How many volt-amperes is assigned to each duplex receptacle outlet in a non-dwelling commercial occupancy per NEC 220.14(I)?

Accepted Answer

180 VA

Answer

NEC 220.14(I) assigns 180 VA to each single or multiple receptacle on one yoke in non-dwelling occupancies.

Question 5

For 'all other' commercial occupancies per NEC Table 220.42, what demand factor applies to lighting loads exceeding 50,000 VA?

Accepted Answer

50%

Answer

NEC Table 220.42 allows a 50% demand factor on lighting loads over 50,000 VA for most commercial occupancies.

(E2) E2 Commercial Electrical Inspector Practice Test