Apprentice path · Stage 18: Raceways · Lesson 60

Layout before bending

You work out where the bend has to end up before you make it, because a bender does not know what you meant.

Why this matters on the job

A bend that is an inch off is scrap, or worse, it is installed an inch off and everything downstream is fought into place around it.

How to think about it

  1. Identify the route the raceway has to take and the obstacles in the way.
  2. Measure from consistent reference points -- the same reference every time.
  3. Follow the bender instructions, under supervision.

Worked through

The word that matters is consistent. A bender makes a bend relative to a mark, and the mark means something only if you know which point on the bend it refers to and you use the same one every time. Change reference point halfway through a run and every measurement after it is off by the same amount, in the same direction, invisibly.

Check yourself: You know the bend needs to be 90 degrees. Is that enough to start bending?

Answer: No. Mark the required finished location before making the bend.

The angle is only half the answer. Where the finished bend has to sit decides where the mark goes, and the mark is what the bender works from.

Watch out for: Measuring from whatever is nearest. Pick the reference points before the first cut and keep them for the whole run.
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Written from the owner's poster for this lesson. Nothing added beyond what the poster states.

Written for Texas apprentices as free study material. The Texas apprentice licence is an application, not an exam (Occupations Code 1305.161), and nothing here counts as apprenticeship hours or continuing-education credit. VoltMark is not affiliated with, endorsed by, or sponsored by NFPA, PSI, TDLR, or any state or local licensing authority. Always follow your employer's safety programme and your supervising electrician.