Prewired R/R connector from UL

To repair my "crispy" wires from the PMA to the R/R connector I ordered a prewired connector from the UL distributor (Wicks Aircraft).  Keith is very helpful and is starting to have good inventory of parts on hand.  Upon receipt, I noted that the wire size for the output pos and neg leads to the aircraft seemed to be undersized for a 30A load.  The wire size are 12ga and I'm thinking they should be 10ga . In the latest install manual the wiring diagram shows those wires as an 8ga to gnd and 10ga to the aircraft system.

For those running a 350iS what are typical amp draws during high power cruise flight conditions?  I have a dual ECU setup and draw approx 20A while cruising at 2600 rpm with all equipment functioning except pitot heat.  With the Dynon pitot heater on and cycling I draw an additional 8 amps.  When initially (after takeoff) topping off the batteries due to ground (non-flight use) I suspect that I am maxing out the capacity of the alternator for a while and have at least 30A going thru the 12ga output wires.  

The prewired connector consists of the three phase wires with 1/4" crimped female spade terminals, and two output wires with 5/16" crimped female spade terminals.  I am considering removing the output wires, and replacing with 10ga and new crimped terminals.  In the meantime, Ray Lawrence is going to ask UL in Belgium their thoughts and if those do need to be 10ga wires.

Any thoughts or questions regarding this anybody?

Cheers!  Dave

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Replies to This Discussion

Permalink Reply by John Bell on October 28, 2019 at 8:27pm

Thanks again.

John

Permalink Reply by John Bell on October 29, 2019 at 12:29pm

How the heck did you get the plug out of the R/R? I dare not try much harder for fear of breaking the housing. It will not budge.

Permalink Reply by John Bell on October 29, 2019 at 2:02pm

Finally got it off intact, gentle patient persuasion. Where did you source the 5/16 female connectors Dave? Not sure if these are standard so may have to ask Keith.

Permalink Reply by David J. Beaulieu on October 29, 2019 at 6:39pm

You can get them from Keith at Wicks...

http://aircraftproducts.wicksaircraft.com/item/all-categories-ulpow...

Likely at an auto parts store as well.  I had ordered a couple of the R/R connectors and pins packages to have on hand for when the time came to wire things up.  I couldn't find the appropriate crimp tool for 10 ga wire and terminal so ended up soldering with the supplied terminals.

Permalink Reply by John Bell on October 29, 2019 at 6:40pm

Thanks David.

Permalink Reply by John Bell on November 5, 2019 at 11:27am

I did find a 10 awg crimper but don’t know if the connectors that come with the kit are meant to go to 10 awg. They look almost maxed out with the 12 awg. Wait till I get them from Keith I guess.

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