A symbol on a drawing means whatever the legend on that drawing says it means -- and not necessarily what it meant on the last job.
Counting materials off a drawing using the wrong symbol meaning gets the order wrong, and nobody finds out until the fixtures arrive.
Work one symbol at a time: take the symbol off the plan, find that exact symbol in the legend, read what it is called, and only then count it. A circle with a cross through it is a ceiling light on this drawing because this legend says so, not because it usually is.
Check yourself: You recognise a symbol from a previous job. Do you still check the legend?
Answer: Yes.
Symbols are conventions, not a standard alphabet, and they vary between projects and between designers. The legend on the sheet in front of you is the only one that governs it.
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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.
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