Electrical & PPE第 80 / 100 题
Why must extension cords used in construction be rated for hard or extra-hard usage?
a.To withstand the rough conditions of a job site without insulation damage
b.To look professional
c.To conduct more electricity
d.To reduce cost
解析
Construction extension cords must be rated for hard or extra-hard usage so their insulation can withstand abrasion, moisture, and rough handling on a job site. Cords rated only for household use damage easily and create shock and fire hazards. The rating is marked on the cord jacket.
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