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Understanding NEC 2020 and disconnects required

I've been out of the game for a little bit (hence all my recent questions). I'm installing a new 400 amp service for a client. It will have two 200 amp panels feed off the meter, one is in the house,...

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Meter to panel distance?

How far can the panel be away from the meter? The code says the panel has to be at the nearest point of entrance but my coworkers keeps saying thy standard is 3'. 230.70

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5th jaw

Hey guys I need some help finding a 5th jaw for this meter socket. I have found one but not sure if it’s the correct style. Here are some pictures did not find a model number on meter. ... 5th jaw

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Is There Ever Insufficient Fault Current Due To Long Service Lateral?

Just wondering. Utilities can size their service laterals much smaller than the NEC would require for the premises wiring. They don't have to have the ampacity of the service disconnect. And they can...

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Adjusting EMT conduit to different knockout location on new service panel

I will be replacing a service panel and the knockouts on the new panel do not align with the old panel. All runs use 1/2 inch EMT conduit which may not be flexible enough to move to alternate knockout...

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Service neutral and back up generators

Obviously when installing a backup generator and ATS you need to bond the service neutral to the ATS. My question is with the meter pulled does the service neutral carry a load. Or rather will it once...

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Triplex or Quadraplex

Due to highly unusual terrain, I have a 400 amp service with 2-200 amp disconnects mounted a considerable distance (175') away from a house and a separate Casita. Each 200 amp breaker is going to serve...

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How to tell if this Panel accepts Tandem Breakers?

I'm lost on whether this Older Cutler Hammer Safety Breaker Panel would safely accept a tandem breaker as there is no diagram or model number on the door. Any ideas on how or where i could find...

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Mystery underground service coupling

I am working on a service upgrade in Southern California in an area that was electrified in the 1920's w. underground conduit. We dug a nice trench down to an old 2" galvanized conduit to our new pad....

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New service to property

Hello all! This is my first post on here. We bought a foreclosed property that has existing overhead line but in very poor shape. The quote to remove service, 3 pole, and trench in new line was going...

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Hi ! New here . Question about aluminum range circuit

I Have an old 40amp range circuit that’s aluminum wire .. 2 blacks and a bare ….. can I use this circuit as a junction and hook up a copper wire for my a/c condenser? I’m using the correct purple .....

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multiwire Kitchen branch circuit and shared neutral

A panel has 2 single pole 20amp breakers for the kitchen with a shared neutral. The house has been there for years so I'm assuming this was done awhile ago. I'm trying to understand how this is ok on...

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Siemens ITE Load Center replacement parts

Anyone know where to get branch breaker terminals for a Siemens ITE load center, model number E4242MB3400-2 ? It is a 3 phase, 4 wire panel in need of a little tender loving care. My local supply house...

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CT Cans, meters, how to?

Hey everyone, Doing a service on my own now...just want to hear everything I can about CT cans and installation advice.

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Strange Voltages

Single phase 3 wire 200 amp service. Everything seems normal. Properly bonded and grounded. But, L1 to neutral/gnd = 122.3 v, L2 to neutral/gnd = 122.9 v, and L1 to L2 = 241v. L1 carries about 1 amp...

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Modify CSED

So, we have a scenario where home has a homeline panel where the utility meter is at the bottom and the panel is at the top of the enclosure. There is a need to install a backup generator and the...

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Receptacles

a 120/240 volt single phase 3 wire feeder supplies 100 general purpose receptacles in a bank which has 2500 square feet when sizing this feeder for the receptacle load what will be the minimum...

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Service through the roof

Any pointers how to install that? What are the code requirements (how far can the pipe stick out, do I need to support the pipe with guy wire, where to mount mast etc?) Is that somewhere in code book?

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I learned something about the new "smart" meters today.

Last week I was working on an old house that had the new smart meter installed two weeks ago. When I arrived there last Thursday, half the house had no electricity. The GC already called the utility...

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Duplex Meter Adapter?

In my over 45 years in the trade I never seen anything like this. Homeowner didn't know anything about it. Asked him if he had solar panels or an apartment . He said No to both. Contacted poco as...

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Blew fridge, furnace etc when useing generator transfer switch

Useing a generator transfer switch. I used a 5000 honda last December with auto idle. I blew the board in ferness and fridge. I picked up a new generac 5500 with no auto idle. Power went out again so I...

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Anyone know what these are?

Hello, I ran into some equipment I have never seen before. Can you all tell me what these pieces of equipment are? Note: They are all in an electrical room and away from the electrical panels. The...

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Double tapping a transformer

Hello everyone, I have been out of the game for awhile, but was recently asked to do a little job for a buddy in a pinch. So I have a 480v MDP and need to feed a step down transformer that will handle...

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How much wall space would you allow/require for a new 200 A resi service?

What's the wall space you usually would want for a 200 A service panel in a detached new build? Edit: Ontario, Canada where service in the basement is norm I normally would go with a 4'x8' 3/4" plywood...

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Separate garage service disconnect 2020 NEC

Please excuse this if someone has already covered this in another post. I'm putting together an estimate for a 60 amp, 120/240 volt feed to a new pole barn from an existing panel in the garage next to...

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EV Charger and service calculations

Hello I have a project of designing and installing an electrical service to serve strictly EV chargers varying from 19.2kw 208V single phase- all the way up to 120Kw 480v three phase. All chargers are...

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Neutral wire issues?

Hi there, so I’m going to start by saying I know absolutely nothing about electrical stuff. We just bought a house two months ago. We purchased it as is. (Huge mistake, but here we are so..) we’ve been...

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Replacement meter jaws parts?

Have a customer looking for a replacement meter jaw part for this meter. Customer really doesn't want to replace whole meter socket since it looks like an easy repair if we can find the parts. Any...

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Missed at the factory?

Has anyone ever seen a multimeter assembly where the manufacturer missed the bus? customer in one of eight units was losing half their power every few weeks fir a few minutes at a time. Main breaker...

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Seen on the job: Overheating Busbar due to solar and AC

Browsing old threads I saw this comment: Looking for an all in one rated at 225A but will have a... my parents are building their own house and are going to be putting up solar sometime in the near...

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240 on black leg/receps and lights getting 240.

So I put a new 125 amp 24 slot panel in a small trailer....first everytime I thrned on light it blowed the bulb...so I tested the feed coming from the meter.outside...i was getting 240 on the black and...

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Bad breaker

So I put a new 125 amp 24 slot panel in a small trailer....first everytime I thrned on light it blowed the bulb...so I tested the feed coming from the meter.outside...i was getting 240 on the black and...

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DC Fast Charger - 120/208 vs 347/600 service

I’ve been asked if it’s possible to install a 50 kW DC Fast Charger on a 120/208 service. I had never contemplated doing that before, but… why not? The 50kW DCFC would take up 170 Amps of the service,...

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I just notice that there is only ONE hot and the neutral going into my...

Is this a problem ? I know that I’m only getting 120 v but I’ve never seen that the other hot wire was not connected to the weather head . This is an older house .

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Electri Center Panel

Anyone see one of these?? Ran across this doing a home inspt. Best of three bad photos.

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