Hazard
A simple definition of a hazard is anything that can cause harm
if things go wrong (eg a fault on equipment).
Risk
A simple definition of risk is the chance (large or small) of harm
actually being done when things go wrong (eg risk of electric shock from faulty equipment).
Portable and transportable
There is no universally accepted definition
of what is meant by portable or transportable electrical equipment. However, in this guidance
it means equipment that is not part of a fixed installation, but is intended to be connected to a
fixed installation, or a generator, by means of a flexible cable and either a plug and socket,
or a spur box, or similar means. This includes equipment that is either hand-held or hand-operated while
connected to the supply, intended to be moved while connected to the supply, or likely to be moved while connected
to the supply. The electrical supply to the equipment is assumed to be at a voltage that can give a fatal electrical
shock to a person, ie more than 50 V ac or l2OVdc.
Examples of portable equipment include: tools and extension leads in the construction industry
(high-risk); grinders and handlamps in general manufacturing (medium-risk); and floor cleaners
and metal-bodied kettles in offices (medium-risk). Extension leads, plugs and sockets, and cord
sets that supply portable equipment, are classified as portable equipment because they operate
in the same environment and are subject to the same use as the equipment they serve.
Note: The word ‘portable’ is used subsequently to mean both portable and transportable.
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