07: 715 Extra-Low Voltage Lighting Installations (295)

Question 1

In an ELV lighting installations, what is the maximum allowable voltage drop between the transformer and the furthest luminaire to comply with Section 525. (715.525 p.297, Appendix 4 6.4 Table 4Ab p.383)

a) 3%
b) 5%
c) 6%
d) 8%

Answer 1

b) 5%

715.525 p.297
Voltage drop in consumers’ installations
In ELV lighting installations, if the voltage drop between the transformer and the furthest luminaire does not exceed 5 % of the nominal voltage of the ELV installation it shall be deemed to comply with Section 525.