Hi amp DC wiring
 

I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

The boat has two sets of house batteries, one set on starboard about 6
feet forward of the starboard winch, one on port almost directly under
the port winch. The DC distribution panel is just aft of the starboard
batteries.Once battery set is 2 4D gels, the other is 2 8D gels.

Is there any reason why I need to wire the port winch all the way
across the boat to the distribution panel? I'm inclined to hook it up
just after the disconnect switch (or with its own disconnect switch)
directly to the port batteries. It would have a circuit breaker, of
course.

Hi amp DC wiring
 

"Dick Locke" wrote in message
...
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

The boat has two sets of house batteries, one set on starboard about 6
feet forward of the starboard winch, one on port almost directly under
the port winch. The DC distribution panel is just aft of the starboard
batteries.Once battery set is 2 4D gels, the other is 2 8D gels.

Is there any reason why I need to wire the port winch all the way
across the boat to the distribution panel? I'm inclined to hook it up
just after the disconnect switch (or with its own disconnect switch)
directly to the port batteries. It would have a circuit breaker, of
course.

Seems logical to me.


--
Evan Gatehouse

you'll have to rewrite my email address to get to me
ceilydh AT 3web dot net
(fools the spammers)

Hi amp DC wiring
 

"Dick Locke" wrote in message
...
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

The boat has two sets of house batteries, one set on starboard about 6
feet forward of the starboard winch, one on port almost directly under
the port winch. The DC distribution panel is just aft of the starboard
batteries.Once battery set is 2 4D gels, the other is 2 8D gels.

Is there any reason why I need to wire the port winch all the way
across the boat to the distribution panel? I'm inclined to hook it up
just after the disconnect switch (or with its own disconnect switch)
directly to the port batteries. It would have a circuit breaker, of
course.

Seems logical to me.


--
Evan Gatehouse

you'll have to rewrite my email address to get to me
ceilydh AT 3web dot net
(fools the spammers)

Hi amp DC wiring
 

On Fri, 02 Apr 2004 22:24:26 GMT, Dick Locke
wrote:
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

The boat has two sets of house batteries, one set on starboard about 6
feet forward of the starboard winch, one on port almost directly under
the port winch. The DC distribution panel is just aft of the starboard
batteries.Once battery set is 2 4D gels, the other is 2 8D gels.

Is there any reason why I need to wire the port winch all the way
across the boat to the distribution panel? I'm inclined to hook it up
just after the disconnect switch (or with its own disconnect switch)
directly to the port batteries. It would have a circuit breaker, of
course.
==============================================
It's OK as long as it has its own disconnect switch and fuse/breaker.
The fuse or breaker needs to be located close to the battery (within a
foot or two).

Wire size is important also as you probably know.

Hi amp DC wiring
 

On Fri, 02 Apr 2004 22:24:26 GMT, Dick Locke
wrote:
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

The boat has two sets of house batteries, one set on starboard about 6
feet forward of the starboard winch, one on port almost directly under
the port winch. The DC distribution panel is just aft of the starboard
batteries.Once battery set is 2 4D gels, the other is 2 8D gels.

Is there any reason why I need to wire the port winch all the way
across the boat to the distribution panel? I'm inclined to hook it up
just after the disconnect switch (or with its own disconnect switch)
directly to the port batteries. It would have a circuit breaker, of
course.
==============================================
It's OK as long as it has its own disconnect switch and fuse/breaker.
The fuse or breaker needs to be located close to the battery (within a
foot or two).

Wire size is important also as you probably know.

Hi amp DC wiring
 

Dick Locke wrote:
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

1500 Watts? Are you sure? The formula P=IE, or I=P/E = I=1500/12=125Amps.
Thats a whole lot of juice. Do you have water cooled jacketed batteries?

Hi amp DC wiring
 

Dick Locke wrote:
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

1500 Watts? Are you sure? The formula P=IE, or I=P/E = I=1500/12=125Amps.
Thats a whole lot of juice. Do you have water cooled jacketed batteries?

Hi amp DC wiring
 

On Fri, 02 Apr 2004 22:24:26 GMT, Dick Locke
wrote:
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

The boat has two sets of house batteries, one set on starboard about 6
feet forward of the starboard winch, one on port almost directly under
the port winch. The DC distribution panel is just aft of the starboard
batteries.Once battery set is 2 4D gels, the other is 2 8D gels.

Is there any reason why I need to wire the port winch all the way
across the boat to the distribution panel? I'm inclined to hook it up
just after the disconnect switch (or with its own disconnect switch)
directly to the port batteries. It would have a circuit breaker, of
course.

You may want to consider doing what the newer/safer systems do. Have a high
amperage bus going down each side of the unit, and the controls being low
voltage control stuff, that essentially turn "relays/selenoids" (or solid
state switches) on/off to control high amperage devices connected directly
to the bus (think of a starter motor controlled by a selenoid, no high amp
stuff going to the ignition/dash etc, versus a switch (horn/pump/etc) that
has the full amperage going thru it). Cuts down big time on voltage loss in
long cable runs (by having two big busses), and it's easier to insulate low
voltage control signals.

Hi amp DC wiring
 

On Fri, 02 Apr 2004 22:24:26 GMT, Dick Locke
wrote:
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

The boat has two sets of house batteries, one set on starboard about 6
feet forward of the starboard winch, one on port almost directly under
the port winch. The DC distribution panel is just aft of the starboard
batteries.Once battery set is 2 4D gels, the other is 2 8D gels.

Is there any reason why I need to wire the port winch all the way
across the boat to the distribution panel? I'm inclined to hook it up
just after the disconnect switch (or with its own disconnect switch)
directly to the port batteries. It would have a circuit breaker, of
course.

You may want to consider doing what the newer/safer systems do. Have a high
amperage bus going down each side of the unit, and the controls being low
voltage control stuff, that essentially turn "relays/selenoids" (or solid
state switches) on/off to control high amperage devices connected directly
to the bus (think of a starter motor controlled by a selenoid, no high amp
stuff going to the ignition/dash etc, versus a switch (horn/pump/etc) that
has the full amperage going thru it). Cuts down big time on voltage loss in
long cable runs (by having two big busses), and it's easier to insulate low
voltage control signals.

Hi amp DC wiring
 

On Sat, 03 Apr 2004 19:40:59 GMT, Gualtier Malde
wrote:
1500 Watts? Are you sure? The formula P=IE, or I=P/E = I=1500/12=125Amps.
Thats a whole lot of juice. Do you have water cooled jacketed batteries?

========================================

Why is a 125 amp intermittent load a problem?

Most engine starters draw that much or more.