How many letters does the top answer for “a worker who installs and repairs electric wiring” have?

The most common answer is wireman (7 letters).

Crossword clue: a worker who installs and repairs electric wiring

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

wireman 7 letters wn-def

a worker who installs and repairs electric wiring

wirer 5 letters wn-def

a worker who installs and repairs electric wiring