Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 15, 2025 ...

I haven't actually purchased the Progressive Industries HW50C Electrical Management unit yet, but probably will soon.  I have been thinking about how and where I will install it.

On the link: Replacing a Transfer Relay

In the third picture below the schematic (first picture with the cover removed), it appears there are 2 sets of 3 wires going through the transfer switch enclosure wall from the left side of the picture and only 1 set of 3 wires going through the enclosure on the right side of the picure.

I presume 1 set of the 3 wires on the left are from the shore power cable and the other set of 3 wires on the left are from the generator set cable.  Is this correct?

If this is correct, I presume the single set of 3 wires going through the enclosure on the right side of the picture is the electrical cable that provides AC power to the main circuit breaker panel and thus AC power to the coach.  Is this correct?

If this is correct, is it possible and reasonable to disconnect the 3 wires in the current cable going through the right side of the enclosure from the relay output and connecting these wires to the output connections on the HW50C then purchasing a short (2-4 feet) section of this same cable to connect to the output connections on the relay and to the input connections on the HW50C?

If this is not a valid and reasonable way to connect the HW50C, what is the best way to connect the HW50C?

Thank you.

Quote from: ncaabbfan – January 06, 2011, 08:50:26 pm

I haven't actually purchased the Progressive Industries HW50C Electrical Management unit yet, but probably will soon.  I have been thinking about how and where I will install it.

On the link: Replacing a Transfer Relay

In the third picture below the schematic (first picture with the cover removed), it appears there are 2 sets of 3 wires going through the transfer switch enclosure wall from the left side of the picture and only 1 set of 3 wires going through the enclosure on the right side of the picure.

I presume 1 set of the 3 wires on the left are from the shore power cable and the other set of 3 wires on the left are from the generator set cable.  Is this correct?

If this is correct, I presume the single set of 3 wires going through the enclosure on the right side of the picture is the electrical cable that provides AC power to the main circuit breaker panel and thus AC power to the coach.  Is this correct?

If this is correct, is it possible and reasonable to disconnect the 3 wires in the current cable going through the right side of the enclosure from the relay output and connecting these wires to the output connections on the HW50C then purchasing a short (2-4 feet) section of this same cable to connect to the output connections on the relay and to the input connections on the HW50C?

If this is not a valid and reasonable way to connect the HW50C, what is the best way to connect the HW50C?

Thank you. 

Morris,
I have a better page for you to look at that is doing exactly what you want to do.
Adding Built in Progressive EMS
In answer to your questions, I believe it is yes, yes & yes. 

I presume that as long as shore power is not connected and as long as the genset is not running, that cable is not energized in any manner.
Thank you.

Morris,
The U270 only has one ATS.  The post which describes the splicing of the wires assumes there are two transfer switches.
 
Nonetheless, the splice is made between the ATS and the main breaker panel.  This is where you need to locate the device in order to protect the input voltage to the panel from either the shore cord or the genset.
 
Good luck.  It's not difficult but working with the heavy gauge wire is not a piece of cake.  You need to plan your wire bends carefully when you're locating and installing the device. 

Quote from: ncaabbfan – January 06, 2011, 10:05:03 pm

I presume that as long as shore power is not connected and as long as the genset is not running, that cable is not energized in any manner.
Thank you.

That is correct.
If you have an automatic Gen Start, make sure it is OFF.

I presume that as long as the generator is not running and no shore power is connected, the cable should be de-energized. Am I correct?

..................I want to make sure I cut or disconnect the correct cable.  Once I know for sure which cable is the correct one, I can check to see what appears the best way to connect the HW50C unit.  I will have to check our coach to determine if it appears it will be better to cut that cable or to disconnect it on one end and connect the HW50C then add a short section of new cable the same size/spec............................................
Thank you.

Morris quote: "So to make sure I understand correctly, the correct cable is the one cable that goes through the right side of the enclosure in the above pictures. Is this correct? "

prepared to do that, but had just enough slack in the cable from the ATS to
just cut it in two, and use the ATS side to connect into the input side of the ATS and the cable entering the breaker panel to connect to the ouput of
the ATS.

just cut it in two, and use the ATS side to connect into the input side of the EMS and the cable entering the breaker panel to connect to the ouput of
the EMS.

I haven't actually purchased the Progressive Industries HW50C Electrical Management unit yet, but probably will soon.  I have been thinking about how and where I will install it.

And do not let any strands of the #6 wire from touching the center plastic cover of the relay.
Inattention to this point has caused the neutral output side of the relay to be compromised by a small broken piece of plastic, causing 240 volts to be applied where 120 volts is expected due to a lost neutral. 

You might want to consider the EMS that has a digital readout.  This device tells us the amp load on each line and is very very helpful in telling us when we are close to exceeding 30 amp service. 

And keep all strands of the #6 wire from touching the center plastic cover of the relay inside the Progressive Industries plastic box.

Inattention to this point has caused the neutral output side of the relay to be compromised by a small broken piece of plastic, causing 240 volts to be applied where 120 volts is expected due to a lost neutral.

Is the relay you reference in the EMS or the transfer relay?