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I noticed that my electrical panel has no main disconnect. I was told it was direct connected , there is no sub panel or anything at the meter. I live in pa, is this legal ?

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There was a time when a main disconnect was not required.

Posted on Dec 20, 2016


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In San Antonio, Tx., for a commercial bldg., can "stranded" insulated 2/0, ground wire, be run from the service disconnect to the subpanel,breaker box?

Scott - STOP!!!!!
You can get yourself in a great deal of trouble. What exactly are you trying to do?

The power company will connect the Neutral point of the meter base to "ground" usually by way of a locking washer mounted on the supply riser if this is to a conventional meter base. However, do not think for a minute that the purpose of this connection is "ground". The power companies intentionally "ground" the Neutral (return) several times on the way back to the transformers. Just like an electrical panel in a residence, there is a electrical connection to ground but its function in both instances is to provide a low resistance path back to the service panel or transformer to trip the breaker or fuse. You cannot rely on "Earth" to trip anything because of the relatively high resistance of earth. Also, it is an equipment protection in the event of a voltage surge or lightning.

Bonding is another instance where a low resistance path is being created.

If this in fact a commercial installation, you must be a licensed electrician to do any work on the electrical system.

Next, before you even begin to determine the size of the wire, you need to determine the size of the load (in VA) that will need to be serviced, not the other way around. For example, a 2/0 copper wire is listed for up to 145 amps.

You cannot run taps directly off of the disconnect. In the case of a secondary panelboard, the feeders to that panelboard must be protected by breakers or fuses from the source.

Nov 29, 2017 | Electrical Supplies

1 Answer

Domestic power supplies

The wide blade is neutral (typically silver) the narrower one is Phase (copper colored), Green is earth, connected to chassis. If that is correct check for a broken neutral wire.

Oct 10, 2016 | Electric Electrical Supplies

1 Answer

Nshow me how to wire Eaton 100amp disconnect

A disconnect is simply as it's called (a disconnect) it is connected directly to the power source and all circuits following depend on the disconnect to provide the connection to the main source. Like a main water line to a home ,there is always a main water value from the city located at your property which must be open to allow water to your home. The electrical disconnect works the same way with electricity from the provider to your home .

Sep 29, 2014 | Electrical Supplies

1 Answer

If my houses electrical panel is a fuse box can i install a sub panel that is breakered or do i have to stay with fuses?

yes you can install sub panel off of the fuse box /jump off main comming into fuse box.too new breaker box..good luck / may have to pull the meter to do this safly so be safe .../joe/

Aug 27, 2010 | Kitchen Ranges

1 Answer

Wiring the 1750 watt eliminator direct to the main panel

DO NOT DO THIS! If I understand you correctly you want to have three ways to have 110 power in your motor home--- (1)Vehicle 12V to inverter to main panel. (2)Generator to main panel. (3)plug the main panel into 110V. If any two of these are connected at the same time and they are both live, somethings going to blow. That's because with AC, the two sources must be synchronized in their cycles very precisely. The utility company connects their power plants together on the grid only with the aid of precise controls. But the really serious problem is the same reason they invented transfers switches for home generators -- if you were connected to (3) and the power went out, and you connected (1) or (2) without disconnecting the dead (3), you will backfeed power to the line outside and you just might kill the lineman who is trying to fix the power outage.

May 20, 2010 | Eliminator MotoMaster Mobile Power...

1 Answer

My house wires from the electic stove top has 3 wires and my new bosch electric top has 4 on red, white, green, yellow?

hook the red and yellow off the new stove to the two hot phases-then connect the white on the new unit to the neutral power connection and finally the green wire can hook to the same neutral wire also as long as the power comes directly from the main electrical panel in the home, but not a sub-panel

Nov 15, 2009 | Bosch 30 in. NET7452UC Electric Cooktop

1 Answer

I've changed out my central heat and air ,with a larger unit , after 5 weeks working fine ,now if my air conditioner ,hot water tank and stove is on along with a few minor appliances my main breaker trips...

No,you can not wire directly to a meter. All wiring must come through the circuit panel or sub panel.
150 amps is sufficient to run what you describe. You may have a weak main breaker or loose wiring to these appliances. Place a amp meter on a incoming supply wire at the main, while you monitor amp draw have someone go around the house and turn on all these appliances. If it trips at less than 140 amps you have a bad main.
I suspect you will find a bad neutral wire on one of these appliances.

Sep 30, 2009 | Goodman Heating & Cooling

1 Answer

Replace 200 amp breaker

If this is the Service Disconnect Switch or Main Switch for the panel, this job should probably left for an electrician to perform, as power should be shut off at the meter socket or at the roadside first. If this is not done, the work will be "hot".

Unlike most circuit breakers in electrical panels, Service Disconnect Switches and Main Switches have the power brought to the panel by entering terminal screws. Shutting the Main or Service Disconnect breaker off prevents the flow of current *into* the panel and other circuit breakers. The large wires that are connected to the terminal screws are LIVE, and will remain so until shut off *upstream*.

Working in a panel with two large diameter cables that do not move easily is a hazard and should not be done unless you are very familiar with this work - and of course, have shut the power off.

Please, reconsider doing this work yourself.

Sep 29, 2009 | Computers & Internet

1 Answer

AC Breaker trips and AC Fan turns slow.

Sounds like you have a bad capacitor for your squirrel cage fan , now as for the a/c unit sounds like you have a direct short in compressor to ground or leg to leg , check all wiring to make sure that it is not grounding out or melted together.

Jul 23, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

I have a home built in the 50's. circuit breakers are pushmatic. 7 breakers on a side. The locking bar down the center will not allow me to replace 2 single pole breakers with double pole. It's for an...

You need to put in what we call a sub box. This should be done by a licensed electrician, but if you really want to do it yourself you will need a distribution box some wire and it has to be connected directly to your main lags from the meter box, this box will have a main breaker built into it and spaces for additional breakers, depending on your existing wiring the electrician might chose to wire the additional box directly to your meter base and not your existing box. Either way you really should seek local professional help on this project, just for your safety and to satisfy your home-owners insurance.

Have a great day..

Mar 06, 2009 | Connecticut Electric & SWITCH UBIP130...

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