A hardwired Power Watchdog is mounted inside the RV instead of hanging at the campground pedestal. Hughes makes separate 30-amp and 50-amp hardwired EPO versions for each generation. The second-generation units include Bluetooth and Wi-Fi; first-generation EPO units have Bluetooth. The original Hughes drawing shows the input/output terminal blocks for the Gen II hardwired models.
See the matching products
Choose an image to open the corresponding NewRVParts product. The item number on your protector determines the correct service part.
PWD30EPOHW — Power Watchdog 30A Gen II Wi-Fi Hardwired EPOGen II internal-mount version with EPO
PWD50EPOHW — Power Watchdog 50A Gen II Wi-Fi Hardwired EPOGen II 50A hardwired EPO unit
PWD30-EPO-H — Power Watchdog 30A Gen I Hardwired EPOGen I hardwired unit; no built-in Wi-Fi
PWD50-EPO-H — Power Watchdog 50A Gen I Hardwired EPOGen I hardwired 50A model
RSM30W — Gen II 30A Wi-Fi Replacement Surge ModuleGen II 30A PWD30W, PWD30EPOW, PWD30EPOHW
RSM50W — Gen II 50A Wi-Fi Replacement Surge ModuleGen II 50A PWD50W, PWD50EPOW, PWD50EPOHW
Identify the original hardwired unit and its surge module
| Hardwired model | Generation | Shore-power rating | Matching replacement module |
|---|---|---|---|
| PWD30-EPO-H | Gen I, Bluetooth | 30A | SP30PWDEPO |
| PWD50-EPO-H | Gen I, Bluetooth | 50A | SP50PWDEPO |
| PWD30EPOHW | Gen II, Bluetooth and Wi-Fi | 30A | RSM30W |
| PWD50EPOHW | Gen II, Bluetooth and Wi-Fi | 50A | RSM50W |
Parts and terminal markings on the verified Gen II drawing
| Factory diagram reference | 30A or 50A | What the drawing identifies |
|---|---|---|
| INPUT | Both | The shore-power supply connection side of the enclosure |
| OUTPUT | Both | The connections feeding the RV electrical system |
| L (hot) | 30A | Single hot-conductor terminal |
| L1 and L2 (hots) | 50A | Two separately identified line terminals for 50A service |
| N (neutral) | Both | Dedicated neutral terminal |
| G (ground) | Both | Equipment grounding terminal |
| Wire-strip guide | Both | Manufacturer illustration shows 3/8-inch maximum exposed conductor |
| Terminal screw torque | Both | Factory illustration specifies 35–40 in-lb for set screws |
| RSM30W and RSM50W | Gen II by amperage | Replaceable surge module; not compatible with Gen I |
| Original EPO surge modules | Gen I by amperage | Use SP30PWDEPO or SP50PWDEPO instead |
Where the hardwired unit sits
Original Hughes hardwired wiring drawing
The second page of the original Hughes installation sheet shows the 30-amp and 50-amp hardwired input/output terminal arrangement side by side.
Open the two-page installation PDF to view the wiring labels and dimensions at full size.
View the Hughes factory 30A/50A hardwired installation diagram (PDF)
Where the hardwired unit belongs
Hughes directs the hardwired Power Watchdog to be installed between the incoming RV shore-power connection and the RV's transfer switch, protecting the shore-power feed before it reaches the coach distribution system. The manufacturer's installation diagram identifies the input and output blocks; the 30A and 50A versions use different conductor arrangements. Follow that drawing and the unit's exact installation instructions.