Allen,
Our read is that it's OK to use unfused wyes on systems with 2 strings only. If one string shorts, the other string can't overcurrent it. As soon as you are ringing together more than two strings, you need to fuse each one. Conrad Cotuit Solar From: [email protected] [mailto:[email protected]] On Behalf Of Allen Frishman Sent: Wednesday, March 07, 2012 4:35 AM To: RE-wrenches Subject: [RE-wrenches] MC4 Y Connectors Wrenchers, Has anyone used MC4 Y Connectors to combine strings? This website claims that they are TUV Certified but does not list the manufacturer. Seems like best practice to fuse each string but wanted to see what others think about this product and the idea of fusing every two strings instead of each individual string. http://www.solarpenny.com/MC4-Y-Connectors-609-4431.htm Al Frishman AeonSolar (917) 699-6641 <tel:%28917%29%20699-6641> - cell (888) 460-2867 <tel:%28888%29%20460-2867> www.aeonsolar.com <http://www.aeonsolar.com/>
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