The problem is they write the rule before the product really exists. It would have been better if the industry had settled on the connector before it was written into the law. Part of the problem is patents. They should settle on a connector that is old enough to be off patent so everyone can make them. (like the good old 5-15)
I personally like the old AMP/Tyco mate-n-lok (that is old enough to be in the public domain) but there are plenty of good connectors.


Greg Fretwell