California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 18 - Explosive Materials
Article 116 - Handling and Use of Explosive Materials in Blasting Operations
Section 5302 - Permanent and Temporary Leading Wires
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) All leading wires shall be type "S" cable or equivalent, or shall consist of 2 suitable insulated solid aluminum or solid copper wires.
(b) Permanent leading wires shall be installed in conduit or shall be strung on insulators and kept at least 5 inches apart.
(c) The conductor used to close the air gap shall be type "S" cable or equivalent.
(d) All leading wires shall have the capacity to carry the required firing current to the detonators. In no case shall a capacity of less than copper wire No. 14 American Wire Gauge or aluminum wire No. 12 American Wire Gauge be used, except No. 18 American Wire Gauge may be used for one electric blasting cap.
Recommended power firing systems for series and parallel series firing with no circuit interrupter.
Recommended power firing systems for series and parallel series firing using a circuit interrupter.
(e) All splices shall be well made and shall be so joined as to be electrical and mechanically secure. Splices shall be taped or otherwise effectively insulated.
1.
Amendment of subsection (d) and new NOTE filed 7-11-2003; operative 8-10-2003
(Register 2003, No. 28).
2. Change without regulatory effect
providing more legible illustrations filed 3-2-2009 pursuant to section
100, title 1, California Code of
Regulations (Register 2009, No. 10).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
