The 'Old School' Method: Referencing the NEC

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Is This True about Old School Vs. New School Electricians? Father and Son Tradesmen Duo 🛠️

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What happens here

The older electrician then explains the traditional, authoritative method for determining conduit fill: consulting the National Electrical Code (NEC) book. He emphasizes that the NEC is a 'reference book' and not meant to be memorized. He outlines the process: looking up the circular mills of the wire, finding the table for PVC Schedule 40 conduit, identifying the correct insulation type (THHN), and then matching down the column to find the allowed number of wires. This highlights a methodical, code-compliant approach essential for safe DIY electrical work.

Goal: Understand the traditional, code-compliant method of using the NEC

Tools and materials

National Electrical Code — The authoritative reference for electrical installation standards and safety regulations

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>> See guys, that's the problem nowadays. But that's a perfect example why you don't need to memorize the NEC that these guys that are constantly promoting, oh, the NEC, the NEC guys, it's a reference book. That's perfect. Now, if you were to ask me how many wires would go in there, what would I do? I would tell you, well, you would go to your code book, look at the circular mills of the wire, look up the table for PVC schedule 40, find the type of insulation, and match down the column, and tell you how many wires to put in. I wouldn't even think to say, "Hey,

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