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Electrician Red Seal · Question

When installing non-metallic sheathed cable (NMSC), commonly known as Romex, what is the maximum spacing for staples or straps when securing the cable to a wooden stud?

CEC Rule 12-510(2) states that NMSC shall be secured by staples or straps at intervals not exceeding 900 mm and within 300 mm of every box or fitting.

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Question: When installing non-metallic sheathed cable (NMSC), commonly known as Romex, what is the maximum spacing for staples or straps when securing the cable to a wooden stud?

Answer options:

  • 300 mm (12 inches)
  • 600 mm (24 inches) ✅ 900 mm (36 inches)
  • 1500 mm (60 inches)

Correct answer: 900 mm (36 inches)

Explanation: CEC Rule 12-510(2) states that NMSC shall be secured by staples or straps at intervals not exceeding 900 mm and within 300 mm of every box or fitting.

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