Apprentice path · Stage 24: Lighting and controls · Lesson 87

Lighting: read the driver

Most LED gear has a driver between the supply and the light, and the driver has an input side and an output side that are rated separately.

Why this matters on the job

Plugging a lamp into a driver because the connector fits is the same error as the plug and the receptacle, with a part that costs more and fails less obviously.

How to think about it

  1. Recognise that many LED systems use a driver.
  2. Read the input ratings and the output ratings as two different checks.
  3. Match the controls and the components as specified.

Worked through

The input side faces the supply and the output side faces the lamp, and they are two different sets of numbers on the same label. Checking one is checking half. The controls are part of it too -- a dimming control that is not the specified one is another mismatch in the same chain.

Check yourself: The connector from the driver fits the lamp. Are they compatible?

Answer: No. A compatible-looking connector does not prove a driver and lamp are compatible.

The connector is mechanical. Compatibility is the output ratings against what the lamp requires, and that is read off the label rather than felt by pushing two parts together.

Watch out for: Checking input and calling it done. Input and output are different checks, and the output is the one facing the thing you are about to connect.
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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.