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A12C
9) Checks to electrical devices
Repair and maintenance to electrical components shall include
initial safety checks and component inspection procedures. If a fault
exists that could compromise safety, then no electrical supply shall
be connected to the circuit until it is satisfactorily dealt with. If the
fault cannot be corrected immediately but it is necessary to continue
operation, an adequate temporary solution shall be used. This shall
be reported to the owner of the equipment so all parties are
advised.
Initial safety checks shall include:
• That capacitors are discharged: this shall be done in a safe manner
to avoid possibility of sparking;
• That there no live electrical components and wiring are exposed
while charging, recovering or purging the system;
• That there is continuity of earth bonding.
7. Repairs to sealed components（Annex DD.4）
1) During repairs to sealed components, all electrical supplies shall
be disconnected from the equipment being worked upon prior to
any removal of sealed covers, etc. If it isabsolutely necessary to have
an electrical supply to equipment during servicing, then a
permanently operating form of leak detection shall be located at the
most critical point to warn of a potentially hazardous situation.
2) Particular attention shall be paid to the following to ensure that by
working on electrical components, the casing is not altered in such a
way that the level of protection is affected.
This shall include damage to cables, excessive number of
connections, terminals not made to original specification, damage to
seals, incorrect fitting of glands, etc.
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