17th Edition Test Questions: 300 Questions to Help You Pass The 17th Edition Exam

Sample questions for assisting you pass the exam and getting to grabs with the IET Wiring Regulations Seventeenth Edition Book.

2. Where an autotransformer is used for step-up purposes:

a) a single-pole switch can be used
b) a linked switch breaking all live conductors must be used
c) no controlling switch is required
d) only a fuse is required