MC4 Higher than 40a???

rafrojack said:

This is "cherry tape", I used this daily doing electrical work on fighter jets. I've seen tons of water get into these. They can loosen over time & are just dangling annoyances. Good luck!

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WOW - we use miles of this a year - never have had an issue ... maybe you guys are not using it correctly -- you need to stretch it to activate it ... BUT the oil industry around the world uses this tape in order to seal connections ...

Most amalgamating tapes etc have a big flaw, they stick and merge with themselves fine but have poor stick to what ever they are wrapped around. Fine for keeping things clean and dry if there isn't serious water problems but once you get water tracking along the outside of the insulation of the wire it's game over. Capilliary action will set it get into plugs / joints / etc. I use amalgamating tapes as external protection but the join underneath is gunked up to avoid this happening.

Supervstech said:

Kinda defeats the disconnecting purpose though...

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Well yes and no , I can still disconnect at the fuse panel by pulling out the spade fuse for each panel or series panels. If I was wiring all panels to junction box on roof with one hot and ground going down in coach I would defiantly keep the MC4's or similar

Freddmc said:

To me designing a system in a vehicle(RV) so as to use thinner gauge wire because it is cheaper doesn't make sense. The runs are generally so short the difference is insignificant.
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The runs are short in some cases but when it comes to PV & wanting to be under 3% voltage drop I can see why people up the voltage & keep the amps the same.

efficientPV said:

example: One solar panel can produce 10A. With two in parallel one shorting and the other sourcing 10A, the shorted panel can only see 10A. With three in parallel two panels can produce 20A. That exceeds what a shorted panel can take. In many places this is code.

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I don't understand why I can't clearly understand this concept. If one shorts as in ISC maxing out or actual internal short (damaged until repaired)?

ghostwriter66 said:

WOW - we use miles of this a year - never have had an issue ... maybe you guys are not using it correctly -- you need to stretch it to activate it ... BUT the oil industry around the world uses this tape in order to seal connections ...

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LOL do they? Because once oil gets on this stuff it is pretty much junk. You need a dry/clean surface, & there isn't any activation in the stretching. You're stretching it so it can create tension around whatever you're trying to tape. It has adhesive type properties on itself (when clean). Different things work for different folks.