Do materials of a loudspeaker driver need to fulfill flammability requirements of 62368-1 when the method “Control Fire Spread” is chosen?
More specifically you asked: Does the speaker cone need to fulfill flammability requirements per 62368-1 standards if the speaker is used as part of the fire enclosure? We know it is exempted in 60065 standards. If yes, what specified tests should be used to verify, or is an additional grill required to show, compliance?
Independent of the methods “Control Fire Spread” or “Likelihood Of Ignition”, IEC 62368-1 provides minimum flammability requirements for materials, and loudspeaker drivers currently are not formally exempted. IEC TC108 has already identified this issue and has created an ad hoc group to address this topic. This ad hoc group consists of representatives from manufacturers and certifiers, and they are currently working on possible solutions, e.g., new overload test for loudspeaker drivers in PS3 circuits. If you are interested in joining the ad hoc group, we recommend that you contact your national committee.