TX Master practice test
TX Master · Question 1 of 2574:04
Electrical Equipment and Devices
A 480Y/277-volt switchboard is mounted on one side of an aisle, and a concrete wall faces it across the aisle. What is the minimum depth of clear working space in front of the switchboard?
Press A-D or 1-4 to choose an answer while this question is on screen.
Lug is off during timed tests. On the free 10-question check and in untimed course practice, Lug walks you through your answers.
Every question is original and written to TDLR's published content outline, and every explanation cites the code section or source it relies on.