Okay, let's break down your EV charger installation questions for your GE Powermark Gold TML12BC panel. It's good you're doing your research before starting the work. Important Disclaimer: I am an AI and cannot provide qualified electrical advice. You should consult with a qualified electrician to ensure safety and code compliance before undertaking any electrical work. Working with electricity can be dangerous, and improper installation can lead to fire or electrocution.

Understanding Your Panel and Breakers GE Powermark Gold TML12BC

This is a load center (electrical panel). Knowing the model number is crucial because it dictates what types of breakers are permitted.

Slim Breakers

These are 1/2-inch wide breakers, also sometimes called "half-size" or "miniature" breakers.

Tandem Breakers

These are designed to allow two circuits to be installed in the space normally occupied by one standard breaker. However, they are not universally compatible.

Panel Compatibility

Your panel documentation or the panel's label should specifically state whether or not tandem breakers are permitted and, if so, which positions in the panel can accept them. Some panels only allow tandems in specific locations.

Addressing Your Questions1. 60 Amp / 2-Pole Breaker



Wire Size

The size of the breaker is determined by the wire gauge and the continuous load. For a 48 amp EV charger, you will need to use a 60 amp breaker. The reason for this is the National Electrical Code (NEC) requires that you upsize your breaker and wiring by 25% of the continuous load. Thus a 48 amp charger will require a 60 amp breaker. This is because the breaker/wire must be rated for 125% of the continous load.

Local Codes

Check your local electrical codes. Some jurisdictions might have stricter requirements than the NEC.2.

Space for a 1-Inch Breaker Using Tandems



The Key Question: Tandem Breaker Compatibility

The crucial factor is whether your GE TML12BC panel allows tandem breakers and whether it permits them in the specific location where you want to install the 60 amp breaker.

Panel Label is Paramount



Examine the panel's label very carefully. It should have a diagram or instructions indicating which slots can accept tandem breakers. The label might show slots marked with symbols or numbers that indicate tandem breaker compatibility. If Allowed

If the label shows that you can install tandems, then yes, you would remove two existing single-pole breakers (replacing each with a tandem) to free up the one full space required for the 2-pole 60 amp breaker.

If Not Allowed

If the panel does not explicitly allow tandems in any or all positions, you cannot use them. Using tandems in an incompatible panel is a code violation and a safety hazard. It can overload the panel's busbars and potentially cause a fire.

Steps You Must Take Before Proceeding1. Consult a Qualified Electrician

This is the most important step. An electrician can: Inspect your panel and verify its condition. Confirm the panel's compatibility with tandem breakers and identify the correct locations for them (if allowed). Calculate the load on your panel to ensure you have sufficient capacity for the EV charger. Determine the correct wire gauge and conduit size for the circuit. Perform the installation safely and in accordance with all applicable codes.2.

Examine the Panel Label

The panel label is your definitive guide to breaker compatibility. Look for diagrams, text, or symbols indicating which positions can accept tandem breakers.3.

Load Calculation

An electrician will perform a load calculation to ensure that adding the EV charger will not overload your electrical service. This is critical for safety and code compliance.

In summary

A 60 amp, 2 pole breaker is likely needed.

The ability to use tandem breakers and install the 60 amp breaker depends entirely* on the panel's specifications and the local electrical codes. You must consult with a qualified electrician and carefully examine your panel's label before proceeding. Don't guess or assume anything when dealing with electricity. Safety first!Good luck with your EV charger installation. Let me know if you have more questions. Flag for review