When electrical cables penetrate watertight...

Question 1 / 270705eccefa3bacbc34ba4d47ebd

Question 1 of 270705eccefa3bacbc34ba4d47ebd

When electrical cables penetrate watertight bulkheads, what must be provided for?

Question 1 of 27070

When electrical cables penetrate watertight bulkheads, what must be provided for?

🔍 Key Concepts

• Watertight integrity of bulkheads and what it protects against • How penetrations (like pipes, cables, ducts) through watertight bulkheads are treated in construction rules • Difference between mechanical support of a cable and maintaining watertightness

💭 Think About

• Ask yourself: what is the primary purpose of a watertight bulkhead, and what must remain true even after a cable passes through it? • Which option specifically addresses stopping water from passing through the penetration, rather than just protecting or supporting the cable? • Think about how packing or sealing is usually achieved when something goes through a watertight boundary.

✅ Before You Answer

• Identify which choice directly addresses maintaining watertightness at the penetration, not just electrical or mechanical concerns • Check which option mentions a method that can be sealed or tightened around the cable • Eliminate any answers that only talk about grounding, bending radius, or simple clamping without mentioning sealing or watertightness

Question 1 of 27070

When electrical cables penetrate watertight bulkheads, what must be provided for?

cables should be grounded on either side of the bulkhead

a watertight stuffing tube capable of accepting packing should be employed

cables must be bent to a radius of six diameters

cables should be secured by a clamp

Question 1 / 270705eccefa3bacbc34ba4d47ebd

Question 1 of 270705eccefa3bacbc34ba4d47ebd

When electrical cables penetrate watertight bulkheads, what must be provided for?

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Question 1 of 27070

When electrical cables penetrate watertight bulkheads, what must be provided for?