Load and heat

[weq92f]

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So...I've got this bus bar where everything connects. All the power grabbers and the power adders (alt, batt) all connect to the bus bar.

While playing with my fan setup today I happened to notice my bus bar has some heat in it at full load (elec fans, A/C, blower on high, lights on bright). Measured the heat at about 150F on the bus bar. I was feeding the bus bar from batt with 4AWG but changed that to 2AWG today. After doing this I had more total voltage at the batt than before (14.5VDC) so I'm sure the 4AWG cable wasn't enough, however the heat in the bus bar didn't really change.

The bus bar has these ratings:

* Continuous amperage of 130 amps AC, 150 amps DC
* Maximum voltage rating 300 V AC, 48 V DC

My alt is 140amp and my estimate of the amperages being pulled through there were below 150, the max rated for this bus.

What are your thoughts on this heat...I'm sure it's been running this way since the day I rewired everything. All power leads off bus bar are fused with either in line or fusible link.

-Kevin