AS NZS 1747:2022 pdf free download – Reeling, trailing and feeder cables used for mining – Repair, testing and fitting of accessories

AS NZS 1747:2022 pdf free download – Reeling, trailing and feeder cables usedfor mining – Repair, testing and fitting of accessories.
1.3.23
proofed tape
tape used under copper braids for cushioning against the power core insulation or for protection of interstitial insulation from abrasion against power core copper braids
1.3.24
reeling and trailing cable
cable having flexible conductors, insulation incorporating conductor and insulation screens where appropriate, filling, reinforcement where appropriate, and protective coverings, and specially designed to provide a flexible electrical connection between portable or mobile equipment and a point of supply
1.3.24.1
reeling cable
cable specially designed for continual reeling, unreeling, and flexing
1.3.24.2
trailing cable
cable specially designed for being trailed behind a moving machine
1.3.25
replacement
restoration of the equipment to meet its original specification by renewing missing, worn, broken or damaged parts
1.3.26
responsible person
competent person who also assumes the responsibility for the management, review and accuracy of all information contained in inspections, reports and documents for a repaired cable
1.3.27
restrained plug
that portion of a restrained plug and receptacle having contacts consisting of sockets and which is attached to a trailing cable and Is designed For engagement within the receptacle
1.3.28
restrained receptacle
that portion of a restrained plug and receptacle, having contacts consisting of pins, which is designed to receive the plug
1.3.29
screened cable
cable In which the insulation of all conductors are collectively enclosed in a conductive layer or where the insulation of conductors are separately enclosed in a conducting layer, or both
1.3.30
semlconductlve elastomer
rubber-like material with conductive properties
1.3.31
sheath
1.3.31.1
liiiier sheath
component of a cable which is applied immediately over the core assembly to protect the cores against mechanical damage From the armourlng or collective metallic screen
1.3.31.2
outer sheath
outermost component of a cable which encloses the underlying components and protects them against damage
3.13.3 Repair of metallic screen without ferrules
The screen shall not be joined over a repaired un-vulcanized insulation. The repair of the screen on each core shall be made by the method described below. Each of the stages Is Illustrated In Figure 3.10. The location of joints in screens of adjacent power cores shall not come into contact with those on adjacent power cores.
(a) Stage I A suitable binder. (e.g. binding wire) shall be used as a temporary measure to prevent each end of the severed screen from unravelling more than is actually required to complete the repair. (The binder Is removed In stage 3.)
One end of the severed screen shall be laid closely over the core and bound circumferentially near us end with one or more turns of tinned copper wire. This binding wire forms a permanent part of the repair. Surplus screen wires which protrude past the binding wire shall be bent away from the core and then cut flush with the binding wire so that no sharp projecting ends or loose ends of screen wires remain against the core. Similarly, all sharp projecting ends of the binding wire shall be removed.
A second permanent binder wire may be placed behind the Initial binder on top of the bound screen at a distance of at least twice the insulation diameter, hut need not be more than SO mm in distance from the initial permanent binding.
(b) Stage 2 The screen to be joined shall be closely laid, directly over the bound section of screen, and shall itself be bound and have surplus screen wires removed in accordance with stage 1.
The overlap of the two sections of screen shall be at least twice the insulation diameter but need not be more than 50mm.
(c) Stage 3 Both ends of the overlap shall be soldered with each soldered section being a maximum of 10 mm wide. The solder shall conform to Appendix.C.
The temporary binder applied at stage 1 above shall be removed. Any excess flux and solder shall be removed and the screen thoroughly cleaned and dried. Tape shall then be applied over the repaired screen in accordance with C1aue 3.14.
The permanent binding wires that are to be soldered shall not be greater than 1 mm OD.