#### BundyRoy

##### Dedicated elf

- Joined
- Apr 9, 2014

- Messages
- 1,026

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- #1

Out of curiosity I got the multimeter out and measured the resistance through my 4 pin 0.75mm2 20cm long pigtails. I was getting readings of around 0.6 ohms. Now even for 14/0.20 cable which is only small the resistance is around 0.043 ohm/m. So on a 5m run (each way) this adds up to a resistance of 10 x 0.043 = 0.43 ohms.

So if my multimeter is even close to right the resistance through a pigtail at each end is 1.2 ohms. I would be better off ignoring the wire resistance and using the pigtail resistance rather than calculating the wire resistance and ignoring the pigtails like I have been so far. The pigtails seem to provide more resistance than the wire.

Is my multimeter way off, am I doing something wrong or is there a lot of resistance in the pigtails. This sort of resistance could lead to significant voltage drop if the strip is using 1.8A per 3m length.

Thanks

So if my multimeter is even close to right the resistance through a pigtail at each end is 1.2 ohms. I would be better off ignoring the wire resistance and using the pigtail resistance rather than calculating the wire resistance and ignoring the pigtails like I have been so far. The pigtails seem to provide more resistance than the wire.

Is my multimeter way off, am I doing something wrong or is there a lot of resistance in the pigtails. This sort of resistance could lead to significant voltage drop if the strip is using 1.8A per 3m length.

Thanks