屋おく内ない配はい線せん

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Meanings

1

noun

interior wiring; indoor wiring

Refers to electrical wiring installed inside a building, as opposed to outdoor or external wiring.

roof, house, shop

内inside, within, between

配distribute, spouse, exile

線line, track

屋おく外がい配はい線せん
屋外配線 refers to outdoor or external wiring, while 屋内配線 is specifically indoor wiring.

Compound of 屋内 (indoor) and 配線 (wiring).