Each working place shall have a separate firing line, of not less than No. 20 wire, with waterproof insulation and of sufficient length to allow the person firing the blast to be in a safe place.
52 P.S. § 70-638
Each working place shall have a separate firing line, of not less than No. 20 wire, with waterproof insulation and of sufficient length to allow the person firing the blast to be in a safe place.
52 P.S. § 70-638