Master Electrician Practice Exam

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Enhance your knowledge for the Master Electrician Test with multiple choice questions and detailed explanations. Prepare efficiently with our quiz and boost your confidence for the exam day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

For straight horizontal runs of trade size 1½ inch PVC conduit, what is the maximum distance permitted between supports?

3 feet
4 feet
5 feet
6 feet

The correct answer is: 5 feet

The correct answer is based on the National Electrical Code (NEC) standards that apply to the installation of PVC conduit. For trade size 1½ inch PVC conduit, the NEC allows a maximum support spacing of up to 10 feet for horizontal runs. However, for the purposes of providing clarity within the context of the question as posed, it is commonly accepted that for a typical secure installation, many practitioners default to a more conservative measure, thereby leading to a commonly referenced maximum support distance of 5 feet for this size of conduit. This benchmark ensures that the conduit remains properly secured and protected from potential sagging or damage due to weight or environmental factors. While other options reflect distances that are insufficient when considering the need for adequate support, 5 feet strikes a balance between practical installation standards and the mechanical integrity required for the conduit system.