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Pollution such as moisture or dust on the surface of test
accessories can reduce their insulation capability. There
are 4 pollution degrees as defined by IEC 664-1:
1 - No pollution or only dry, non-conductive pollution
occurs. The pollution has no influence.
2 - Normally only non-conductive pollution occurs.
Temporary conductivity caused by condensation is to be expected.
3 - Conductive pollution occurs, or dry non-conductive
pollution, which becomes conductive due to condensation, is
to be expected.
To be found in industrial environments or construction sites
(Harsh environments).
4 - The pollution generates persistent conductivity
caused by conductive dust, rain or snow.
CAT I
Equipment for connection to circuits in which measures are
taken to limit the transient overvoltages to an appropriate
low level
Example: Inside electronic equipment.
CAT II
Energy-consuming equipment to be supplied from the fixed
installation.
Example: Inside household appliances and portable tools or
simplified. Any apparatus connected to a wall outlet.
CAT III
Equipment in fixed installations.
Example: Installation in buildings, from main fuse box to
wall outlet.
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( re our TM Lxxx products )
The current ratings shown are for continuous use at either
AC RMS or DC or a mixture of both up to the stated figure.
- ( re our TM Lxxx products )
The majority of plastic components are made of Nylon with
a temperature range of -30° C to 100° (-22°F to
212°F).
IEC 1010 is an internationally recognised standard of design,
manufacture and test to which all good manufacturers adhere.
This gives the end user confidence when buying IEC 1010 compliant
products that the product is the best available and complies
with the very latest safety standard.
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