Electrician Red Seal · Question
An electrician is installing wiring in an unfinished basement and needs to support a non-metallic cable (NMD90). What is the maximum spacing between supports allowed for horizontal runs of NMD90 cable along the surface of framing members?
Rule 12-510(1) states that non-metallic sheathed cable shall be secured by staples, straps, or other devices at intervals not exceeding 1.5 m (5 ft) when instal
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Question: An electrician is installing wiring in an unfinished basement and needs to support a non-metallic cable (NMD90). What is the maximum spacing between supports allowed for horizontal runs of NMD90 cable along the surface of framing members?
Answer options:
- 300 mm (12 in)
- 600 mm (24 in) ✅ 1.5 m (5 ft)
- 2.5 m (8 ft)
Correct answer: 1.5 m (5 ft)
Explanation: Rule 12-510(1) states that non-metallic sheathed cable shall be secured by staples, straps, or other devices at intervals not exceeding 1.5 m (5 ft) when installed along the surfaces of building members.
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