Motor Start Capacitor - 'P2 Protected'

Ross Currie said:

Whilst dismantling an old household appliance, I noticed that the motor start capacitor is prominently marked as being 'P2 PROTECTED'.


I've had a quick look on the internet - but whilst I can find many manufacturers offering capacitors with P2 protection, none really explain what the protection is or where it is required.


Is this something similar to Class X / Class Y capacitors as defined in BS EN 60384 or is it something else entirely?

Sorry I missed this at the time ... BS EN 60252 is the relevant standard. Quick description of the ratings available here: https://en.wikipedia.org/wiki/Motor_capacitor

The 'P' ratings in older Editions of the standard are now 'S' ratings - P0 is now S0, P1 is now S1, P2 is now S2, and, with the move to 'S' ratings, a new rating of S3 (for which there is no Px equivalent) was introduced.

Ross Currie said:

Whilst dismantling an old household appliance, I noticed that the motor start capacitor is prominently marked as being 'P2 PROTECTED'.


I've had a quick look on the internet - but whilst I can find many manufacturers offering capacitors with P2 protection, none really explain what the protection is or where it is required.


Is this something similar to Class X / Class Y capacitors as defined in BS EN 60384 or is it something else entirely?

Sorry I missed this at the time ... BS EN 60252 is the relevant standard. Quick description of the ratings available here: https://en.wikipedia.org/wiki/Motor_capacitor

The 'P' ratings in older Editions of the standard are now 'S' ratings - P0 is now S0, P1 is now S1, P2 is now S2, and, with the move to 'S' ratings, a new rating of S3 (for which there is no Px equivalent) was introduced.