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eliminated. It should be noted, however, that anti-static
footwear cannot guarantee an adequate protection
against electric shock as it introduces only a resistance
between foot and floor. If the risk of electric shock has
not been completely eliminated, additional preventative
measures are essential. Such measures, as well as the
additional tests set out below, should be a routine part
of the accident prevention programme of the workplace.
• Experience has shown that the discharge path through an
anti-static product should normally have an electrical
resistance not exceeding 1,000 MΩ at any given time
throughout its useful life. A value of 100 kΩ is specified as the
lowest limit of resistance of a product when new, in order to
ensure some limited protection against electric shock or
ignition in the event of any electrical apparatus becoming
defective when operating at voltages up to 250 V. However,
users should be aware that in certain circumstances the
footwear may not give adequate protection. Additional
measures to protect the user should be taken at all times.
• The electrical resistance of this type of footwear can be
changed significantly by flexing, contamination or
moisture. The footwear will not perform as intended if
worn in damp or wet conditions. It is therefore
necessary to ensure that the product is capable of
fulfilling its intended function of dissipating electrostatic
charges and providing some protection against electric
shock during the whole of its life. The user is
recommended to establish a routine test for electrical
resistance and to use it at regular and frequent intervals.
Summary of Contents for 974240
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