I have talked to them twice now and they have not been much help with the feed through option. They basically can tell me what size wire you can feed through but not the amperage… the only amperage rating I can get out of them is on the meter and the top part that leaves the lugs… this is what I have been trying to figure out for the last couple days… I’ll attach the spec sheet that was posted for the model I wanted to go with
Understanding the rating on rv pedestals
- Thread starter Necnerd
- Start date
MTW
Senior Member
- Location
- SE Michigan
I don't see why you can't use the feed through lugs on the bottom of the 200A pedestals and place several of them on the same parallel feeder chain. The main 200A overcurrent device being at the supply to the string of pedestals. keep the wire size at 200A for the entire chain, to the last pedestal, them they are all protected at the maximum rating of the feeder.
Each individual pedestal head can have their own circuit protection, depending on what outlets you choose. and that the total connected load does not exceed the 125A rating of the head assembly, feeder wiring and branch circuit bus.
There should be some load diversity as well, because it's very unlikely that all pedestal outlets will be using their maximum capacity simultaneously. Depends on who the customer rents sites to.
You could also confer with your inspector, customer and utility that your design and pedestal selection meets their requirements before ordering.
I used to go river tubing/camping and bring along a 2HP portable compressor to fill up hundreds of truck inner tubes and small rafts for the weekend river float trips and never had a problem with the setup described, and that was along with the needs of another 100 campers on the same weekend. There is normally a big diversity of campers needs, depending on time of day and conditions.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Unless there is an internal main breaker, the feed through lugs need to be the same rating as the interior bussing. The NEC and UL tap rules apply.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Listing possibly could let you have 200 amp bus at the main/feed through terminals and lesser bus beyond that? Helps that it is intended to be somewhat a definite purpose kind of thing and not a generic panelboard that has somewhat unlimited applications it could be used for.
Manufacturer might get it listed that way, but we in field couldn't put together a 200 amp splice box and then directly feed a main lugs panel with 125 amp bus without providing proper overcurrent protection to the bus.
MTW
Senior Member
- Location
- SE Michigan
That's the way it appears to me, the feed through lugs is a splice point in the feeder, with a tap point to feed the local buss in the panel.
Tap rules are applied in the panel, the internal buss is right after the tap, and is limited to the 125A with a maximum of six breakers, all grouped together. And the breakers and outlets are factory provided and installed to comply with the tap and protection rules.
Appears to comply with the tap rules as constructed, how else would the product get listed.
Specifications
• UL-listed 125 Amps, 120/240 VAC—1Ø power outlet.
• Short circuit current withstand rating 10,000 RMS symmetrical amperes.
• NEMA 3R welded enclosure for durable outdoor use.
• Enclosure constructed with galvanized 16-gauge steel.
• ANSI 61 gray polyester powder coat finish.
• Convenient concentric knockout configurations and mounting embosses.
• Hub opening with closure plate allows for meter retrofit.
• Wire terminations accept copper or aluminum conductors for loop feed wiring.
• Line: (2) 1/0-#12 Ground: (2) 1/0-#14 and (4) #6-#14 Neutral: (2) 1/0-#14 and (4) #6-#14
• Six circuit plated copper interior accepts standard plug-in type circuit breakers. Rated up to 125 Amps.
• Three position self-grounded receptacle bridge accepts most standard NEMA receptacles with mounting plates.
• Components factory wired with stranded copper wire.
• Lockable hinge cover and deadfront are removable for installation and maintenance. Stay-open hinge cover has safety
interlock on deadfront. Deadfront cover must be removed before hinge cover can be removed.
Please consult serving utility for their requirements prior to ordering or installing, as specifications and approvals vary by
utility, and may require local electrical inspector approval. All installations must be installed by a licensed electrician and must
comply with all national and local codes, laws and regulations. Milbank reserves the right to make changes in specifications
and features shown without notice or obligation.
Tap rules are applied in the panel, the internal buss is right after the tap, and is limited to the 125A with a maximum of six breakers, all grouped together. And the breakers and outlets are factory provided and installed to comply with the tap and protection rules.
Appears to comply with the tap rules as constructed, how else would the product get listed.
Specifications
• UL-listed 125 Amps, 120/240 VAC—1Ø power outlet.
• Short circuit current withstand rating 10,000 RMS symmetrical amperes.
• NEMA 3R welded enclosure for durable outdoor use.
• Enclosure constructed with galvanized 16-gauge steel.
• ANSI 61 gray polyester powder coat finish.
• Convenient concentric knockout configurations and mounting embosses.
• Hub opening with closure plate allows for meter retrofit.
• Wire terminations accept copper or aluminum conductors for loop feed wiring.
• Line: (2) 1/0-#12 Ground: (2) 1/0-#14 and (4) #6-#14 Neutral: (2) 1/0-#14 and (4) #6-#14
• Six circuit plated copper interior accepts standard plug-in type circuit breakers. Rated up to 125 Amps.
• Three position self-grounded receptacle bridge accepts most standard NEMA receptacles with mounting plates.
• Components factory wired with stranded copper wire.
• Lockable hinge cover and deadfront are removable for installation and maintenance. Stay-open hinge cover has safety
interlock on deadfront. Deadfront cover must be removed before hinge cover can be removed.
Please consult serving utility for their requirements prior to ordering or installing, as specifications and approvals vary by
utility, and may require local electrical inspector approval. All installations must be installed by a licensed electrician and must
comply with all national and local codes, laws and regulations. Milbank reserves the right to make changes in specifications
and features shown without notice or obligation.
Last edited:
One way you can do it for your 4 possibly 6 total sites, is 180A feeder ampacity (your calculated load), 200A breaker permitted.
Get pedestals rated for their load, loop your feeder thru a electrical hand hole near each pedestal, install a triple tap mole.
Then use a outdoor feeder tap of unlimited length following the requirements in NEC 240.21(B)(5), to the rv pedestals.
The pedestals then only need to have a main rated for the pedestal.
Get pedestals rated for their load, loop your feeder thru a electrical hand hole near each pedestal, install a triple tap mole.
Then use a outdoor feeder tap of unlimited length following the requirements in NEC 240.21(B)(5), to the rv pedestals.
The pedestals then only need to have a main rated for the pedestal.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Tap rules are one thing.
Then we usually need to protect panel bus per it's rating.
If it is listed for 200 amp feed through as is, we don't have to worry about overcurrent protection of the bus, it is listed for this.
If is service conductors supplying it (devices with meters very well could be?) tap rules don't apply. However 230.40 says one set of underground service conductors can only supply one set of service entrance conductors and I don't believe NEC would allow daisy chaining these if supplied by service conductors.
MTW
Senior Member
- Location
- SE Michigan
You could have a valid point as others had suggested, Necnerd never stated, that I recall, that it was service conductors supplying the pedestals. The models that I looked at, none of them had a SUSE listing that I saw. And his layout sketches at the beginning seemed to show a 200A service disconnect at the head end before the runs to the pedestals, making the supply runs feeders.
KWH Meters at pedestals at campsites don't imply to me that it is necessarily a utility electric service, they can be used for billing the short term tenants for their use during their stay. The pedestals can be obtained either way, with or without meters. Some of the marina models can be had with internet and water connections as well besides electric service. the models I looked at came in 125 or 200A UL ratings, but none of them showed a main protecting the panel bus, rated at 125A or 200A the only protection was shown in any of them was breakers for the installed outlets. Maximum of 6 grouped in one location. Basically the same thing you would have with a MLO panel, limited to 6 breakers. Seems to me that the MLO bus would be protected by the factory installed breakers and outlets, along with the tap rules and the limitation that there is only space for six branch breakers.
This is likely why they are vague on feed through ampacity in the specifications and suggest getting AHJ approval before ordering.
Yeah there is a 200amp service disconnect with feed through lugs that I planed on running the feeders from and looping each pedestal out…
they make a pedestal with main breaker and with out. They also says service entrance rated on the specs on post 22.
These will be feeders and the meters are only there to meter individual rv site for tenant billing.
Yeah it’s hard to get a direct answer on that. I’m sure if I got a hold of the right person, it so far I haven’t had good luck…
they make a pedestal with main breaker and with out. They also says service entrance rated on the specs on post 22.
These will be feeders and the meters are only there to meter individual rv site for tenant billing.
Yeah it’s hard to get a direct answer on that. I’m sure if I got a hold of the right person, it so far I haven’t had good luck…