[PSUBS-MAILIST] MK-101 Connectors

[Alan via Personal_Submersibles]

Hi Jon,
good point about the vulnerable protruding pins.
SubConn do sell dummy fittings that could be fitted on to the spare motors protruding
pins & locked in place with the locking sleeves. The ideal set up would, as you say be a
male / male extension cord & female on the motor & hull penetrator. The main problem
is that it goes against a World wide convention, & for those of us trying to build to rules.
it may be problematic. There is a G.L. section on electrical rules for submarines which is 
a sub section of electrical rules for ships. I would have to go through the ship rules to
find out. 
I don't know whether we could just carry a spare motor connector out in the field.
It may be that you have to pull the motor apart to attach the connector. Unfortunately
I don't have a 101 motor so can't get down to the nitty gritty of this. My worries are 
having enough wire to attach the connector to the motor then twist it in the opposite
direction prior to screwing the connector in; but not having too much slack wire that
it won't fit in the small area of the motor stub. It may be that Vance & David's solution
of cutting down the shaft that fits in the stub, is the way to go.
Might have to leave this up to Cliff when he gets back to sort out.
With the kort nozzles I built it was easy to slide in a new motor, & I could replace one
in a minute. But that brings us back to the generic kort nozzle thread that we had a
while back.
Alan



Sent from my iPad

> On 31/07/2014, at 12:31 am, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> A male connector threaded directly into the housing shaft stub is going to suffer the same potential of broken pins depending upon handling.  One clumsy move and you may have an unusable motor in the field so you'd have to carry some spare male connectors just in case.  Additionally, unless you have a configuration in which you can slide the motor into it's mounting and at the same time mate the male (motor) and female (hull) connectors you're going to end up with a pigtail or cable of some sort to make the electrical connection from motor to hull.  So I think you'd be better off with a female connector on the motor and a cable with two male connectors to make the electrical connection if a cable is required to make the electrical connection.
> 
> If SubConn could produce a two pin high power connector you could save penetrations by using a 4 pin female on the hull to feed two motors.  This would require a custom cable but the K600 used a similar configuration for the original lights.
> 
> When we did our last minn-kota order the saltwater versions were the same price as the fresh water versions so there was no incentive to go with fresh even though they would work just as well.
> 
> Jon
> 
> 
>> On 7/30/2014 6:15 AM, Alan James via Personal_Submersibles wrote:
>> David & Cliff
>> was thinking that if we used the 4 pin high power connector,
>> http://macartney.com/sites/default/files/brochures/SubConn_High_Power_4pins_0.pdf
>> then the 2 spare pins could have a thermister on them measuring the motor temperature 
>> as you were intending to do David.
>> The HPBH4M "male" fitting on the motor would mean you would have as Cliff suggested, the safety feature
>> in that if the male & female came apart the live end would be female & wouldn't short on anything
>> (apart from water).
>> I am wondering if there is any off the shelf adapter we could use to screw this straight on to the motor wiring outlet.
>> Also is it feasable to attach bayonets or whatever to the pigtails (does it have pigtails) to fit them directly to the motor electrics.
>> Can this be done while the motor is apart & then be put back together?
>> Any thoughts?
>> Cliff, are you intending to use the saltwater motor controller?
>> http://www.minnkotamotors.com/advantage/saltwater.aspx?sectionID=3
>> Alan
> 
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