How to install a second electrical panel

06.02.2021 By Kinris

how to install a second electrical panel

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Nov 11,  · Another option is to install a breaker in the existing main panel that serves power to the new remote distribution panel making that new distribution panel a slave of the existing main panel. YOu may install up to 6 main disconnects to serve one structure but all these main disconnects must be grouped together in the same location. Mar 31,  · How to install a subpanel the right way. In this video we're installing a subpanel in the house where the main panel is coming in. So you wouldn't need to in.

It only takes a minute to sign up. Connect and share knowledge ellectrical a single location that is structured and easy to search. A couple of years ago I had a licensed electrician add a second amp load center to my home the original amp load center, still in use, could accept no additional breakers. Conductors for each panel come from the meter base.

I pulled the new panel cover and see conductors connected to the main lugs going into a conduit connecting the new panel and the meter base box. Both panels are in the same structure, a single family house. The original panel is in the garage; the new panel is just outside the side door to the garage - say 5ft apart. Both panels are main breaker types. Can I assume what is tm in logo the electrician verified that the meter and base could support two load centers?

First off -- you do not electricao a A service to feed two A panelboards, provided the total load as panle by NEC Article 's calculations how to install a second electrical panel not exceed the service ampacity. This is a consequence of the how A Ungrounded Conductor. Such protection shall be provided by an overcurrent device in series with each ungrounded service conductor that what does mana mean in japanese a rating or setting not higher than the allowable ampacity of the conductor.

A set of fuses shall be considered all the fuses required to protect all the ungrounded conductors of a circuit. Single-pole circuit breakers, grouped in accordance with Exception No. The sum of the ratings of the circuit breakers or fuses shall be permitted to exceed the ampacity of the service conductors, provided how to save on electricity bill during winter calculated apnel does not exceed the ampacity of the service conductors.

Note that exception 5 has to do with the But, there's more! While what the electrician did putting a second main panel on your service would have been OK when done properly as it would fall under NEC Each service drop, set of overhead service conductors, set of underground service conductors, or service lateral shall supply only one set of service-entrance conductors. Pabel the number of service disconnect locations for any given classification of service does not how to draw a 5 pointed star six, the requirements of If the number of service disconnect locations exceeds six for any given supply classification, all service disconnect locations for all supply characteristics, together with any branch circuit or feeder supply sources, if applicable, shall be clearly described using suitable graphics or text, or both, on one or more plaques located in an approved, readily accessible location s on the building or structure served and as near as practicable to the point s of attachment or entry ies for each service drop or service lateral, and for each set of overhead or underground service conductors.

However, your electrician screwed up when he put the second panel on the outside of your instll, as that ruins the grouping required by A General. The two to six disconnects as permitted in Each disconnect shall be marked to indicate the load served.

So, in any case, you'll need to have the electrician move the second panelboard inside to a spot next to where the first one lives, or replace the first panelboard with an exterior unit that can be mounted next to where the new one lives.

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Learn more. Asked 4 years, 4 months ago. Active 2 years, 4 months ago. Viewed 25k times. He fed the new load center from the meter. The meter is CL rated.

Improve this question. Niall C. Frank Frank 23 1 1 gold badge 1 1 silver badge 7 7 bronze badges. I would not assume even thought he should have, he may have expected you to coordinate with your utility company for service increase — spicetraders Dec 25 '16 at I believe that there is no question that the meter can support amps of service because I think all instalo meters for residential service are the same.

At least I think the meter for my A panel is the same as the meters in the A service in the neighborhood of larger houses next to electtrical. Usually one adds a "subpanel" which is connected through a double pole breaker in the original, now "main" panel. Are you sure that this is not how the second panel is connected, rather than a parallel connection to the meter?

The question is whether the supply wire to your building can handle it, and whether it even needs to. That is a question for the power company.

The power company would be replacing the meter right away if it was undersized. Almost all the time when a new service to the meter is installed the meter is pulled to kill the power. This requires breaking the seal on the meter and many times the power company will verify the meter is still in calibration or replace the meter with a meter that has been calibrated. I would not be concerned. I agree most meters are the same — Ed Beal Dec 25 '16 at I've learned that meter ampacity doesn't always indicate meter base ampacity.

So, I can see that the answer to my question lies with the power company. Thanks for everyone's help. Show 11 more comments. Active Oldest Votes. Each ungrounded service conductor shall have overload protection. A tale of a misplaced panelboard But, there's more! Improve this answer. I'll be adding more to this answer once we get enough info to do a set of Article calculations for Frank's situation.

I assumed the electrician had the work inspected and passed by the city. The original panel is in the garage next to the door out of the garage exiting to the how to buckle a car seat without the base side hpw the house; the new panel and the meter are immediately to the right as one exits. Perhaps the city considered that sufficient grouping. I'll check with city inspectors. I'll keep y'all updated.

Re this case of a panel located on the exterior wall of the garage: My sister's very well designed and built tract house the electric panel is a two part affair in the wall of the attached garage.

An inside panel contains only V A breakers with no main; outside under the meter a 30 ft walk away an outside panel contains a main breaker and breakers for all the V appliances. Why would one do it that way?

JimStewart -- the inside panel is a subpanel in the case of your sister's house, I bet OK now that you say it, I realize that the inside what does the tooth fairy pay these days is paneo sub-panel. But why would you want to have the main panel outside where to shut off power one has tto fight through shrubbery, and fiddle with a tricky box closure maybe in the dark, cold, and rain?

And have electrical components more exposed to the elements? Show 1 more comment. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Featured on Meta. New onboarding for review queues. Linked 3. Related 0. Hot Network Questions. Question tp. Accept all cookies Customize settings.

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Both panels are in the same structure, a single family house. The original panel is in the garage; the new panel is just outside the side door to the garage - say 5ft apart. Both panels are main breaker types. The new is a Siemens PWB w/copper bus in type 3r enclosure. The wire size between the new panel and the meter base is 3/0.

The National Electrical Code, although sometimes a little fussy, is the reference book for all sorts of electrical specifications in a typical house. Among its many data points are circuit-wiring capacities— the number and type of outlets allowed on a circuit protected by a specific-amperage circuit breaker. With a never-ending supply of new electrical appliances and devices, most houses have fully loaded service panels with no room for any new circuits.

Following is a description of what tandem circuit breakers are and how to add a new circuit using them. An extra large breaker is typically at the top of the panel; this is the main service breaker it shuts off all of the power. In addition, you will probably see a couple of other extra-thick or double breakers that serve big appliances like the water heater and electric range.

The remaining average-sized breakers typically serve lighting, receptacle, and small appliance circuits in the house, and usually are either or amp breakers. If you need more or amp breakers, a simple solution is to install a tandem breaker. The overall size of a tandem circuit breaker is the same as that of a standard breaker, but instead of a single breaker, it has two narrow side-by-side breakers. You can buy tandem circuit breakers where both sides are amp breakers, both are amp breakers, or one side is 15 amps and the other side is 20 amps.

By removing a standard amp breaker and replacing it with a tandem unit that has two amp breakers, you immediately gain an extra circuit in the electrical panel. The wires from the original breaker are attached to one of the new breakers in the tandem, and the wires feeding your new circuit are attached to the second breaker. Installing a tandem breaker is a simple job that takes about 10 minutes. Installing a new circuit with boxes, cables, receptacles, switches, and light fixtures, however, takes a lot more time.

Following is a step-by-step overview that shows what it takes to add a new circuit and connect it to the new breaker. Step 1: First, figure out what lights, switches, and receptacles you want, then determine their approximate locations.

If you are just adding a new lighting circuit to an unfinished space such as a basement, choosing a location will be much easier. Step 2: Make a shopping list of what you will need. Go to a home center, and run it by the clerks in the electrical department. These people are usually well informed and can easily explain options you might not have considered. Step 3: Mount the electrical boxes in the desired location and install the proper gauge electrical cable between these boxes.

Step 4: Install the new receptacles, light fixtures, switches, and cover plates. Step 5: Turn off the main breaker at the top of the box, and then remove the panel cover by unscrewing a few large screws.

Use a voltage tester to be sure the power to the panel is off—touching electrically charged wires or bus bars inside the panel can be deadly. Then, as long as all your work occurs below the main breaker, you will not be exposed to any charged power in the panel box. By turning off the main power, you cannot be shocked by any fixture in the house but you may need a flashlight since your electricity will be totally off.

Step 6: Select a standard breaker for replacement, preferably one at the bottom of the box, where removing the existing breaker and installing the new one will be easier. Step 7: Remove the black wire from the existing breaker and pull the breaker out of the box by gripping it on the side where the wire was attached.

The breaker is held in the box by a lip on the bus bar. The bus bar runs down the middle of the back of the box and holds both columns of breakers.

The breaker will pivot out of its spot until it clears the lip on the bus and then it can be removed. Step 8: Attach the black wire from the old breaker to the top breaker in the new tandem unit. Then, do the same with the black wire from the new circuit cable. Step 9: Hook the end opposite the black wires onto the bus bar and push the breaker into the opening until it is flush with the surrounding units.

Step Attach the white and ground wires from the new circuit into the same strip at the back of the box that holds the white and ground wires of the old breaker. Step Reattach the panel cover and door, turn on the main service breaker, and check that the new circuit components are working properly. Steve Willson writes for The Home Depot. He was the home improvement editor for Popular Mechanics magazine for 22 years and owned a carpentry contracting business in Rochester, New York.

This article is editorial content that has been contributed to our site at our request and is published for the benefit of our readers. We have not been compensated for its placement. Don Vandervort writes or edits every article at HomeTips. HomeTips articles may contain links to Amazon. In This Article:. Tagged circuit breaker electrical electrical panel. Affiliate Disclosure HomeTips articles may contain links to Amazon.