ECN Forum Forums Code Related Discussion Canadian Electrical Code Topics #37 marrette only up to 300v?

Thanks Robert
The Marrete black #37 are the ones I was talking about. Had no idea that they were high temp or only good for 300v. Of course all of this is printed on the side of the box in little tiny leters as my apprentice happily pointed out. Didn't realize they were porcelin either!