I'm getting sick of supposedly knowledgeable, experienced journeyman / masters who don't quite live up to their promises (or their pay). I'm working on a (closed book) quiz to hand out during the application process to see what they know. Not looking to make it too hard, but I'm looking for questions that you would know if you work in the field every day (commercial and industrial only).
Here is what I've come up with so far, too hard, too easy? Suggestions for more questions would be appreciated.
For what it's worth, the applicants i'm handing this to are getting more wrong than right.
1. How many #12 THHN current carrying conductors can you install in a 1” conduit and still provide overcurrent protection with a 20-ampere breaker?
2. What is the smallest AWG size grounding conductor that you can pull using black insulation and re-code green with colored tape?
3. When bending a 30-degree, 6” offset in a 1” EMT conduit, how far apart would you make your layout marks?
4. Consider the drawing below, assume #2AWG conductors. If you are going to use a square pull box (i.e, 10x10, 12x12, etc.), what is the minimum size you could use?
(drawing didn't copy, but it's a square JB, 3" conduits, straight pull left to right, angle pull from left to bottom)
5. What is the required working space depth for a 120/208V electrical panel to a concrete wall?
6. What is the required working space depth for a 277/480V electrical panel to a concrete wall?
7. How many total degrees of bend are allowed in a 1-1/2” conduit run between pull points?
I feel that this is simple stuff that, if done wrong, costs a lot of time and money to rectify when the inspector fails the install.
Here is what I've come up with so far, too hard, too easy? Suggestions for more questions would be appreciated.
For what it's worth, the applicants i'm handing this to are getting more wrong than right.
1. How many #12 THHN current carrying conductors can you install in a 1” conduit and still provide overcurrent protection with a 20-ampere breaker?
2. What is the smallest AWG size grounding conductor that you can pull using black insulation and re-code green with colored tape?
3. When bending a 30-degree, 6” offset in a 1” EMT conduit, how far apart would you make your layout marks?
4. Consider the drawing below, assume #2AWG conductors. If you are going to use a square pull box (i.e, 10x10, 12x12, etc.), what is the minimum size you could use?
(drawing didn't copy, but it's a square JB, 3" conduits, straight pull left to right, angle pull from left to bottom)
5. What is the required working space depth for a 120/208V electrical panel to a concrete wall?
6. What is the required working space depth for a 277/480V electrical panel to a concrete wall?
7. How many total degrees of bend are allowed in a 1-1/2” conduit run between pull points?
I feel that this is simple stuff that, if done wrong, costs a lot of time and money to rectify when the inspector fails the install.