Upgrading an Electrical Service Panel

How should I upgrade my electric service panel? Considerations when Upgrading an Electric Service Panel.

Main Electric Service Panel
Electrical Question: How should I upgrade my electric service panel?

Our home was built in 30’s. The service meter is 200amps. The panel originally installed is an old Square D. The problem is there are several circuits bundled together and terminated under breaker lugs.The service entrance wire from the meter to the panel is two insulated 2/0 aluminum wires and one aluminum stranded twisted around both the others. The entire service wire is in a sheath covered cable. There is a solid number 4 copper ground coming from the exterior ground rod to the existing panel. There is no visible insulated neutral wire (Typically seen in older homes). We want to change out the panel and install a new 200 amp main panel.

My questions are: Is it safe, being I have a solid ground to take the single strand wire and twist it together, coat it with insulation electrical tape not to have any bare wire existing, and use it as a neutral wire? The existing wire was installed when walls were open and is strapped. We will have to tear out a wall cavity to replace it, which is what I want to avoid if possible. Second, What is the farthest distance allowed from the meter can to the location of a panel with main? I will consider running copper as feed. Third, If replacement is our only choice for the entrance wire, will the meter head can have to be changed also?

Additional Comments: Great website.

This electrical question came from ML a Homeowner in Rockwell, NC.

Dave’s Reply:
Thanks for your electrical question.

Upgrading an Electric Service Panel

Main Electrical Service Panel
Be aware that at the main service panel the neutral and ground are bonded together. This however is only at the main service panel, and additional panels that are added are then required to have separate wires for the ground and neutral which will originate and bond together at the main service panel. Typically the bonding of the neutral wires and the ground wires at the main electrical service are to the terminal block system that is provided inside the main service panel.

The service entrance cable that you have described is typical.
The ground wire system that you have described is also typical as long as it has been installed and bonded properly.
To correct the problem of having more than one circuit wire attached to a single circuit breaker you may want to consider installing an additional sub panel where more circuit breakers may be installed.

More about Upgrading an Electric Service Panel

Electrical Codes for Services
Wiring Electrical Codes

Basic House Wiring Circuits

House Wiring Circuits and Circuit Breakers

This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes.
Electrical Panel Circuit Listing

Home Electrical Circuits

Electric Circuit Listing

The size of the home electrical service panel is designed by calculating the square footage of the home and factoring in the code requirements for the electrical circuits that are required.

Electrical Circuit Breakers

Home Electrical Circuit Breakers

A guide to home electrical circuit breakers and how they work to protect your electrical wiring. When properly installed, your home electrical wiring is protected by a circuit protection device.

Guide to Home Electrical Wire

Electrical Wire for the Home

Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.

Electrical Grounding

Electrical Grounding Methods and Requirements

Listing of electrical codes for grounding with examples of electrical grounding codes for home electrical wiring.

For Best Results Consult a Licensed Electrical Contractor.
Locate An Electrical Contractor in Your Area

» You Can Avoid Costly Mistakes! « Here's How to Do It: Wire It Right with the help of my Illustrated Wiring Book Great for any Home Wiring Project. Complete Guide to Home Electrical Wiring Perfect for Homeowners, Students, Handyman, Handywomen, and Electricians Includes: Wiring GFCI Outlets Wiring Home Electric Circuits 120 Volt and 240 Volt Outlet Circuits Wiring Light Switches Wiring 3-Wire and 4-Wire Electric Range Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet How to Troubleshoot and Repair Electrical Wiring Wiring Methods for Upgrading Electrical Wiring NEC Codes for Home Electrical Wiring ....and much more.

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

« My light fixture does not work right, what is wrong?

How To Install a Floor Outlet »

Home Electrical Wiring and Electrical Repairs Please Note: Unless otherwise posted, please refer to the following Guidelines when working on Electrical Projects: Skill Level: Intermediate to Advanced - Electrical Repairs and Circuit Wiring is Best Performed by a Certified Electrician or Licensed Electrical Contractor. Electrical Tools Required: Basic Electricians Pouch of Hand Tools, a Voltage Tester and a Multi Meter. Estimated Time: Depends on personal level experience, ability to work with tools, work with electrical wiring, and the available access to the project area. Precaution: Identify the project circuit, turn it OFF and Tag it with a Note before working with the wiring. Important: Modifying existing electrical circuits or installing additional electrical wiring should be done according to local and National Electrical Codes, with a permit and be inspected.

» Electrical Wiring Book «

Home Wiring Guide

STAY CONNECTED

ELECTRICAL NEWS UPDATES