Whats_per_question
New Member
This is also why a commissioning step is very important; imagine if the connector was *mostly* working, just dropping say 30% of the voltage instead of all the voltage. In this case, you might not notice the problem, but if you had commissioned, you would have picked up that the current and voltage didn't match the expected values, and investigate.
Regarding the dielectric grease comment, you should probably only follow the manufacturer's installation procedures. None of the MC4's I've ever used require (or even allow) the addition of any sealant or insulator, but I will stand corrected if someone can point me to one.
And with MC4's, be wary of any internet "expert" that tells you to disassemble the connector and slide part of it onto the cable before crimping - I've never come across an MC4 manufacturer that teaches disassembly of the MC4 - this is a recipe for getting a seal pinched, water ingress, and connector failure.
Regarding the dielectric grease comment, you should probably only follow the manufacturer's installation procedures. None of the MC4's I've ever used require (or even allow) the addition of any sealant or insulator, but I will stand corrected if someone can point me to one.
And with MC4's, be wary of any internet "expert" that tells you to disassemble the connector and slide part of it onto the cable before crimping - I've never come across an MC4 manufacturer that teaches disassembly of the MC4 - this is a recipe for getting a seal pinched, water ingress, and connector failure.