How much resistance / loss is created by using too many XT90 connectors

[B8rez 2g4]

For example , if you had 4 battery packs
Then joined them all together with XT90's (4 X Female) to (1 X Male) output then to the load
Essentially a 4 to 1 adapter
Is the loss of any significance ?

 

[hbpowerwall]

I wouldn't expect any at low draws - if there was you'd be hard-pressed to notice anything.. If you had a thermal camera that would be a quick way to visually see the losses. High loads for sure there would be some sort of losses

 

[B8rez 2g4]

Hey thanks for your reply HBPowerwall.

My new motor draws 42 Amps max . When back EMF kicks in it draws much less.

Would you consider that a high load

 

[hbpowerwall]

Googles says XT90 (I would assume genuine ones as there are more off-brand ones out there these days than real and in my experience the off brand are 1/4 the rated...)

1. They are rated for 100 amp duty ,designed to handle 100 Amps continuously without exceeding 80°C.

Test for heat and voltage drop you'll soon find their limits

 

[daromer]

And if you dont want that heat we generally say max 1/2 of their raiting. XT contacts are known to work on RC and thus you only run for minutes at a time and then the heat that is generated is not a problem since it will cool down in short again.

 

[B8rez 2g4]

Thanks Daromer. So to be safe ...

Only use 50 amps for the XT90's
And 30 amps for the XT60's

My motor bursts @ 42 amps for very short periods

It should be OK

 

[ajw22]

The cable used will be very important, too.
A thicker cable will act as a heatsink and more efficiently draw away any heat generated in the connector. You can even use an oversized cable, and trim away a few strands at the tip until it fits in the connector. Use plenty of solder! Keep adding until nothing more goes in, to maximize electrical/thermal contact with the connector.