Re: [PSUBS-MAILIST] Bilge pump thrusters

["Rick and Marcia" <empiricus@telus.net>]

Hi, Dave . . .

That 36 amps seemed a little excessive to me so I checked the Rule web site
for specs.

As follows: the Rule 4000 gph (US gallons) is 15 amps at 12vdc.
The Rule 1100 gph (US gallons) is 3.3 amps @ 12vdc.

I'm not an electrical person so I don't know if these amperages are
"weldable" or not.  I do know that the switches are sealed and guaranteed
for a certain number of cycles.  The switch float chambers (if applicable)
would probably need compensation.

Regarding the bilge pump thrusters, it would be a good idea to install an
arming switch to the hot wire in case the pumps activated without permission
(should the contacts weld together).

Rick Lucertini
Vancouver, Canada



----- Original Message -----
From: "Dave Everett" <deverett@idx.com.au>
To: <personal_submersibles@psubs.org>
Sent: Tuesday, December 07, 2004 11:05 PM
Subject: Re: [PSUBS-MAILIST] Holding depth


> At 05:13 PM 12/8/2004, you wrote:
>
> >Hi, Peter . . .
> >
> >Thanks for the input on switches.  On-off, on-off, on-off - I can handle
> >that!  Not much circuitry involved.
>
> Switches are pretty simple, but... They will suffer from the current
> pulsing across the contacts as you turn on and off. Eventually they may
> even weld together or burn out. As we are talking about 36A that is
> equivalent to a small welder.
>
> Dave Everett
>


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