flammability & IEC61010 1

[HDS]

I have a product that is going to be listed under IEC 61010. There is a sheet of foam that is used for thermal insulation inside of the enclosure. Does it need to have a flammability rating such as HBF?

I have read the spec and a few references but I couldn't figure out the answer.

 

[Prosource42]

Hi,

According to clause 9 of 61010:

There shall be no spread of fire outside the equipment in NORMAL CONDITION or in SINGLE FAULT CONDITION. Figure
5 is a flow chart showing methods of conformity verification.

Conformity is checked by at least one of the following methods.
a) Testing in the SINGLE FAULT CONDITIONS (see 4.4) that could cause the spread of fire outside the
equipment. The conformity criteria of 4.4.4.3 shall be met.
b) Verifying elimination or reduction of the sources of ignition within the equipment as specified
in 9.1.
c) Verifying, as specified in 9.2, that if a fire occurs it will be contained within the equipment.

My interpretation of each of the methods would suggest that your insulating foam does not need to have a flammability rating.

Nick Scott

http://www.easycomplianceguide.com/

 

[HDS]

thank you Nick. That agrees with what I have learned elsewhere.