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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
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 is absolutely 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. Ensure that apparatus
is mounted securely. Ensure that seals or sealing
materials have not degraded such that they no
longer serve the purpose of preventing the ingress of
flammable atmospheres. Replacement parts shall be
in accordance with the manufacturer's specifications.
NOTE: The use of silicon sealant may inhibit the
effectiveness of some types of leak detection
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