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Electricians and EE's familiar with EC 3 and EC 5 connectors
Posted on 12/17/14 at 7:32 pm
Posted on 12/17/14 at 7:32 pm
Does this make sense ? Why does resistance go up from a 10G to a larger 8G wire ?
"" The 10 AWG wire on our Alligator to EC5 is rated to 140A continuous current. The EC5 connector on the end is however only rated to 120A continuous, and would fail before the 10 AWG wire. Replacing the 10 AWG with 8 AWG would only add resistance, with no benefit to the 120A current limit. "
Im wanting to make a connection with an EC 5 to 8 G wire with alligator clips (that connect to the engine starter leads).
This is for a cable I need made for a mini 600 A jump starter
"" The 10 AWG wire on our Alligator to EC5 is rated to 140A continuous current. The EC5 connector on the end is however only rated to 120A continuous, and would fail before the 10 AWG wire. Replacing the 10 AWG with 8 AWG would only add resistance, with no benefit to the 120A current limit. "
Im wanting to make a connection with an EC 5 to 8 G wire with alligator clips (that connect to the engine starter leads).
This is for a cable I need made for a mini 600 A jump starter
8
Posted on 12/17/14 at 7:35 pm to Drop4Loss
ETA: apparently I'm retarded.
This post was edited on 12/17/14 at 7:47 pm
Posted on 12/17/14 at 7:44 pm to Drop4Loss
I was going to simply say larger wire less resistance.
This post was edited on 12/17/14 at 8:51 pm
Posted on 12/17/14 at 8:03 pm to Drop4Loss
I don't know about all of the resistance stuff but I made a pair of jumper cables out of some #8 thhn the other day and they work perfectly
Posted on 12/17/14 at 8:21 pm to Drop4Loss
You need to find the bypass valve and work back from there. It eliminates a lot of the math as a bonus.
Posted on 12/17/14 at 8:23 pm to Drop4Loss
quote:
The 10 AWG wire on our Alligator to EC5 is rated to 140A continuous current. The EC5 connector on the end is however only rated to 120A continuous, and would fail before the 10 AWG wire. Replacing the 10 AWG with 8 AWG would only add resistance, with no benefit to the 120A current limit. "
Resistance per unit length of wire decreases as the number of the wire decreases, 8 gauge will having a larger circular cross section than 10 gauge will result in a foot of 8 AWG having a lower resistance than a foot of 10 AWG. The current handling capability is doesn't mean much without knowing the length of wire, the voltage being used and what type of voltage drop is acceptable.
This post was edited on 12/17/14 at 8:25 pm
Posted on 12/17/14 at 8:31 pm to Drop4Loss
Assuming all other variables are the same (voltage, wire length, etc) a 10 AWG will have higher resistance but lower amperage capacity than 8 AWG.
I = V/R. Lower AWG has a thicker cross section, thus lowering your R value and increasing your I value.
The statement you quoted is incorrect.
ETA: If I had to guess at what they meant: substituting 10 AWG with 8 AWG only increases the current capacity, still making the EC 5 the part that will fail first.
I = V/R. Lower AWG has a thicker cross section, thus lowering your R value and increasing your I value.
The statement you quoted is incorrect.
ETA: If I had to guess at what they meant: substituting 10 AWG with 8 AWG only increases the current capacity, still making the EC 5 the part that will fail first.
This post was edited on 12/17/14 at 8:34 pm
Posted on 12/17/14 at 10:49 pm to Drop4Loss
Ohm's Law
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