221Use of exploders

221 Use of exploders A shot-firer using exploders must ensure that— (a) an exploder used for electrical firing is of a kind suitable for use with the particular kind of detonator and size of firing circuit; and (b) the size of the firing circuit does not exceed the capacity of the exploder; and (c) the exploder is fitted with a device that, by its removal, renders the exploder inoperable; and

(d) the device mentioned in paragraph (c) is, while the exploder is not being used to fire explosives— (i) out of the exploder; and (ii) in the shot-firer’s possession and control while the shot-firer is on duty; and (e) that any exploder, when not in use, is stored in a clean area that is free from moisture, oil and other contaminants.