Page 101 - International safety guide for oil tankers and terminals

GENERAL HAZARDS FOR SHIP AND TERMINAL

4.3 Portable Electrical Equipment
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4.3.1 General

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All portable electrical equipment, including lamps, for operation in
hazardous areas must be of an approved type. Before use, portable
equipment should be examined for possible defects such as damaged
insulation and a check made that cables are securely attached and that
they will remain so throughout the work. Special care should be taken
to prevent any mechanical damage to flexible cables or wandering
leads.

4.3.2 Lamps and Other Electrical Equipment on Flexible Cables
(Wandering Leads)
The use of portable electrical equipment on wandering leads should be
prohibited within cargo tanks and adjacent spaces or over the tank deck,
unless, throughout the period the equipment is in use:

The compartments within which, or over which, the equipment and the
leads are to be used is safe for Hot Work (see Section 9.4).
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The adjacent compartments are also safe for Hot Work, or have been
purged of hydrocarbon to less than 2% by volume and inerted, or are
completely filled with ballast water, or any combination of these (see
Section 9.4).
All tank openings to other compartments not safe for Hot Work or purged as
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above are closed and remain so; or
the equipment, including all wandering leads, is intrinsically safe; or
the equipment is contained within an approved explosion-proof housing.
Any flexible cables should be of a type approved for extra hard usage, have
an earth conductor, and be permanently attached to the explosion-proof
housing in an approved manner.

In addition, there are certain types of equipment that are approved for use over
the tank deck only.

The foregoing does not apply to the proper use of flexible cables used with
signal or navigation lights or with approved types of telephones.

4.3.3 Air Driven Lamps
Air driven lamps of an approved type may be used in dangerous/hazardous
areas although, to avoid the accumulation of static electricity at the appliance,
the following precautions should be observed:

The air supply should be fitted with a water trap.
The supply hose should be of a low electrical resistance.

Permanently installed units should be earthed.

© ICS/OCIMF/IAPH 2006 67