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Old 12-02-2015, 02:55 PM   #31
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Originally Posted by leland1950 View Post
Don't really appreciate that! I'm a contractor and Licensed Electrician and certainly know what's what. Been at this since '80 and just because you "think" it's unsafe, doesn't make it so. If you plug into the trailer first, which is separate from everything, you can hold right onto the "suicide end because there's nothing there. There is no "back feeding' anymore than hooking up the standard 30 amp cord.
Not going to get into a pissing match - but as both an electrician and an emergency responder, suicide cords hurt and kill people, and are a hack job at best.

It's not what I think, BTW - it's code...

Quote:
406.6(B) Connection of Attachment Plugs. Attachment plugs
shall be installed so that their prongs, blades, or pins are not
energized unless inserted into an energized receptacle or
cord connectors. No receptacle shall be installed so as to
require the insertion of an energized attachment plug as its
source of supply.
Using a proper inlet to feed into the trailer would be a different thing altogether.

You may know it's setup to hurt people, and treat it accordingly - not everyone would...

Imagine a scenario, if you will - kid walking past trips on the cord, and pulls it out of the trailer end - kid, wanting to be helpful (and to try and hide he was cutting through someone's campsite), grabs the cord to plug it back in, and catches the live, exposed blades, and burns his hand, or worse...

a) How would you feel?

b) How fast would a lawyer be on you?
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Old 12-02-2015, 03:32 PM   #32
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Old 12-02-2015, 04:00 PM   #33
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Originally Posted by doc73 View Post
Bit OT but I thought the auto formers had their own issues of taking the available power from the neighbor's? Now potentially damaging their stuff.

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You can't "take" power from the system. It's all about watts consumed. Volts x Amps equals watts. At lower system voltages your current demand rises. As the system voltage rises the current demand is less.

30 amps at 100 volts = 3000 watts
25 amps at 120 volts = 3000 watts

Your rv electrics (AC, TV, etc. ) will run more efficiently at 120 to 125 volts quite possibly reducing the current requirement by a tiny amount.

The closer you can run your camper electrics to design (usually 120) voltage the lower your current draw will be.
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Old 12-02-2015, 04:34 PM   #34
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I can only speak from the standpoint of having 30AMP & 50AMP sites and having campers say they need 30amp and having a 50amp RV. Our new equipment we are installing are multiplex boxes 50-30-20 AMP. They are load sensing and are designed to shut down in the event of an overload. The ones currently installed and functional will not allow a 30AMP receptacle to be dogboned or used with a splitter. This is purely a safety issue for us.
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Old 12-02-2015, 04:34 PM   #35
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Originally Posted by Nick M View Post
You can't "take" power from the system. It's all about watts consumed. Volts x Amps equals watts. At lower system voltages your current demand rises. As the system voltage rises the current demand is less.

30 amps at 100 volts = 3000 watts
25 amps at 120 volts = 3000 watts

Your rv electrics (AC, TV, etc. ) will run more efficiently at 120 to 125 volts quite possibly reducing the current requirement by a tiny amount.

The closer you can run your camper electrics to design (usually 120) voltage the lower your current draw will be.
Ok, not an electrician so sorry... But it acts as a capaciter to build up the lost power or is it a fancy device to stop your usage at 25 amps now to keep the voltage right.
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Old 12-02-2015, 04:38 PM   #36
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Originally Posted by OntarioFireFighter View Post
Not going to get into a pissing match - but as both an electrician and an emergency responder, suicide cords hurt and kill people, and are a hack job at best.

It's not what I think, BTW - it's code...



Using a proper inlet to feed into the trailer would be a different thing altogether.

You may know it's setup to hurt people, and treat it accordingly - not everyone would...

Imagine a scenario, if you will - kid walking past trips on the cord, and pulls it out of the trailer end - kid, wanting to be helpful (and to try and hide he was cutting through someone's campsite), grabs the cord to plug it back in, and catches the live, exposed blades, and burns his hand, or worse...

a) How would you feel?

b) How fast would a lawyer be on you?
As above, no electrician here... But if I am reading right I have seen these 30 / 20 plugs that end in a FEMALE 50 plug. I can see how they would be a suicide plug from their looks. But, if someone has one (and will admit it LOL), the two male ends musts be isolated from one another I would think??? Leg one on the 30 plug and leg two on the 20 plug, if not would they make fireworks when a hot 30amp plug is shorted into a hot 20 amp plug on another circuit? DISCLAIMER!!! I am not an electrician so be gentle...
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Old 12-02-2015, 04:39 PM   #37
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Originally Posted by Camper John View Post
I can only speak from the standpoint of having 30AMP & 50AMP sites and having campers say they need 30amp and having a 50amp RV. Our new equipment we are installing are multiplex boxes 50-30-20 AMP. They are load sensing and are designed to shut down in the event of an overload. The ones currently installed and functional will not allow a 30AMP receptacle to be dogboned or used with a splitter. This is purely a safety issue for us.
So how does the box know I am using a dogbone? Do they look different than a regular box?
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Old 12-02-2015, 04:43 PM   #38
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Originally Posted by BamaBob View Post
You can get them at Amazon.com Joe:

http://www.amazon.com/Camco-55185-Po...30+Amp+adapter
Or go to Walmart as I have bought all kinds of adapters. There. later RJD
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Old 12-02-2015, 05:00 PM   #39
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They do look a little different. They are about 8" taller and the inside has 3 breakers and a GFCI. When we wire them in, they wire just like a 50AMP but the multiplexer is draw sensing and decides which plug to energize. It has helped our line draw tremendously. We can have 4-50's on a 200AMP master and not see any drop in source amperage at the RVs.
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Old 12-02-2015, 05:11 PM   #40
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A bit a hijack. So for any further discussion on autotransformers please check the reviews of the Frank's Autotransformer in the product review forum.

If you need more info please start a specific thread.
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