User: Max Headroom, Location: Claremont CA 91711
Asked on: Tuesday, April 1, 2025 at 10:42 pm EDT
Answered on: Tuesday, April 1, 2025 at 10:42 pm EDT
Question: Hello, all I have so far is a few photos but I think this must be an old Challenger panel, I would like to add a 50 amp double pole or maybe even a 60 amp for a EVSE install. Does anybody know what modern breaker would work? Thank you
Okay, let's figure this out. Identifying the panel and finding compatible breakers can be tricky, especially with older panels. Without seeing the photos, I can give you some general guidance, but you'll definitely need to take photos of the panel for a definitive answer.
General Approach1. Panel Identification is Key
The brand and model of the panel are the most important factors. You need to find this information. It is almost always stamped on the inside of the panel door or the side of the enclosure itself.2.
Determine Compatibility
Once you have the brand and model, you can research which breakers are compatible. This can sometimes be found online (breaker cross-reference guides), by contacting a reputable electrical supply house, or contacting an electrician.3.
Safety First
Do not attempt to work on the panel live. De-energize the main breaker before inspecting or doing anything. If you are not comfortable working with electricity, hire a qualified electrician.
Information Needed Photos
Overall Panel
A clear shot of the entire panel, both with the door closed and especially with the door open. Make sure the photo is in focus and well-lit.
Panel Label
A close-up, in-focus photo of the panel's label. This is crucial. The label will contain the manufacturer, model number, voltage, amperage rating, and a list of approved breaker types.
Interior
A close up of the buss bar/interior rail where the breakers clip in.
Where to Look for Information on the Panel Inside the Panel Door
The label is most often on the inside of the panel door.
On the Panel Enclosure
If not on the door, look for it on the sides, top, or bottom of the metal enclosure itself. Sometimes it's stamped into the metal or on a separate sticker.
Typical Challenger Panel Considerations (Keep in mind, this is general, and photo confirmation is needed)
Old Challenger panels are often compatible with Eaton CL series breakers. This is a common substitute that is usually compatible. The CL series offers both 50 amp and 60 amp double pole breakers. Check for UL Listing
Any breaker you install must be UL listed for use in that panel. Using an unapproved breaker is a safety hazard and a code violation.
Steps for Breaker Installation (Assuming You've Determined Compatibility and are Qualified)1. Turn off the Main Breaker
Absolutely critical.2.
Verify No Voltage
Use a non-contact voltage tester to confirm that the panel is de-energized.3.
Remove the Panel Cover
Carefully remove the panel cover, being mindful of the live bus bars inside.4.
Prepare the Wires
Run the appropriate gauge wire (check the EVSE installation instructions and local codes for wire sizing) to the panel location. Strip the ends of the wires.5.
Install the Breaker
Snap the new breaker into the designated space on the bus bar. Make sure it is firmly seated.6.
Connect the Wires
Connect the wires to the breaker terminals and tighten the screws securely. Follow the manufacturer's torque specifications if available. Connect the ground wire to the ground bus bar in the panel.7.
Replace the Panel Cover
Carefully replace the panel cover, ensuring all wires are properly tucked away and not pinched.8.
Turn on the Main Breaker
Turn on the main breaker.9.
Test
Test the new circuit with a multimeter or by plugging in the EVSE (after it's properly installed).
Important Warnings Aluminum Wiring
If the house has aluminum wiring (common in some older homes), you must use connectors and procedures specifically designed for aluminum-to-copper connections. Improper connections can cause fires.
Panel Overload
Make sure that adding a 50 or 60 amp circuit will not overload the panel's overall capacity. Consult an electrician to perform a load calculation if you are unsure.
Local Codes
Follow all local electrical codes. Permits may be required for this type of work.
In summary, please provide clear, in-focus photos of the panel, especially the label. Then I can give you more specific information. Flag for review