Thats a lot of hood popping and under chassis crawling.for no good reason. Try to find all those out here and on distributed on 6 buildings while the company is looking at is and asking what we did wrong. Crimping Pliers Terminals Tool Kit 2.5-6.0mm²/AWG26-10 Solar Panel PV Cable Connectors MC4 Electric Wiring Crimper Hand Tools. Even the o-rings were of sub standard material. New 1pc Solar MC4 Pliers Solar Powered Crimping Pliers 2.5-6mm2 14-10AWG crimping Tool MC4 Photovoltai connector special forceps. The cause of failed array wiring tests, poor quality connectors where contacts were just touching from dimensional differences and poor retention locking. Then he agreed we have a problem.'Huston defect to Mexico no other way to avoid shame Then when we were testing the array conductor insulation with a high voltage tester (megger) there were high capacitance readings coming back from everywhere. he said company desire to save money, shrug. Then after terminating the first set, demonstrated that they did not fit properly and would disconnect if deflected or pressed slightly. i looked at it, grimmaced and notified the head electrician that these were inadequate equipment. They gave me a small pallet of cases connectors that same alibabba/amazon crapple. I was electeician and pv tech on a 1.2 megaWatt system here last winter. The chinese modules often suffer this debilitation and when you mix cheap chinese connectors with cheap indian module leads. The hung ji chu shun whatevers may look alike but do not fit. The digits 1 to 4 stand for the contact pin cross section in mm 2.Please, just use the MC brand MC4 connectors made in germany. Multicontact was the name of one of the original manufacturers which caught on. The letters ‘MC’ stands for Multicontact, and do not imply multiple contacts in the connector. Voltage is normally rated to 600 V in the US and 1000 V outside the US, and ingress protection to IP 67. Current rating specifications by one manufacturer are about 30A, with contact resistance less than 0.5 Ω. They will normally take AWG 10 or AWG 12 wires to crimp or solder. MC4 connectors Normally a tool will be required to disconnect, but in some designs tabs can be pressed to unlock and pull. MC2 and MC4 are again push fit types but have a positive locking mechanism and proper ingress protection as per IEC 29. ![]() MC2 and MC4 connector: positive locking and ingress protection NEC code was revised in 2008 to additionally require positive locking and ingress protection. These were what we call MC1 and MC3 connectors. Now those could be used by ordinary people. ![]() Essentially, these were rubber shielded jacks and sockets that would push mate. MC3 Connectors To overcome these two problems different designs were put on the market starting in about year 2000. Solar panels in series invariably exceed this. ![]() National Electric Code (NEC) forbids people other than trained technicians to handle naked equipment at more than 50 volts. MC 1 and MC3 connector Previously, the lead out wires of the solar panels would be screw tied to other panels or control equipment, in a simple junction box and would soon succumb to weather effects. But then a poisoned arrow hit that very vulnerable heel, and he died as predicted). When came of age he fought victoriously because nothing would harm him. But the heel she was holding him by was not wetted. She somehow took him to the river of life and dipped his head down. When he was born his mother was told that he would die young. (For those who do not know, Achilles was a character in Greek mythology. But the lead out cables can become the Achilles heels of the panel. The solar panel is given a very good protection against weather during the manufacturing process.
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