Distrobution block started melting..Why?

[knukonceptz 10+ year member]

Fastforward to today, it has melted even more. I have to WIGGLE around the metal where the fuse connects the wire for the sub amp for my amp to get power.

High current draw and wiggling do not make for a good combination. If this is something you installed months back, the bass or road vibrations may have vibrated your connection a bit loose. A loose connection may not have visable sparks or arcing, but because the connection is not tight, you get high resistance. Resistance creates heat, if excessive enough and if it is left alone long enough it can make enough heat to melt plastic.

Once the block sustained some damage it probaly only got worse from there. If you can see or feel your power wire move when crimped or in a block, its a point of high resistance, causigng a loss in voltage and creating heat

 

[Captain_Ahab 5,000+ posts]

Well i inspected it closer and really have no clue what caused it still..The connection was a tad loose, but not enough to cause any harm I don't think..And it had been installed around a year before this started happening.

Got another distro block on the way...

 

[knukonceptz 10+ year member]

Seriously any loose connection is a problem, period. You have an RF X7 - a 1500W amp that draw 150A. A loose/poor connection on a 50A draw would make enough heat to melt plastic.