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WACs > Title 296 > Chapter 296-52 > Section 296-52-67230











296-52-67225    

296-52-67235







No agency filings affecting this section since 2003







WAC 296-52-67230









Initiating systems.









(1) Electric systems.

(a) Safety switch. A safety switch must be:
(i) Placed at intervals in the permanent firing line when firing from a power circuit.
(ii) Made:
(A) So it can only be locked in the "off position"
OR
(B) With a short-circuiting arrangement of the firing lines to the detonator circuit
(b) Lighting gap. A lighting gap must be:
(i) At least five feet ahead (in the firing system) of the main firing switch, between the switch and power source.
(ii) Bridged by a flexible jumper cord just before firing the blast.
[Statutory Authority: RCW 49.17.010, [49.17].040, and [49.17].050. WSR 02-03-125, § 296-52-67230, filed 1/23/02, effective 3/1/02.]