The model number of a household electrical distribution box is typically found on a label inside the panel door or on the exterior, and should be expressed exactly as printed by the manufacturer, including any letters, numbers, or suffixes.

Locating the Model Number

1. Check the Panel Door: Most distribution boxes have a label on the inside of the door that lists the manufacturer, panel type, and model number .
2. Look Inside the Box: Some panels include additional labels near the circuit breakers or bus bars that repeat the model or serial number .
3. Exterior Labeling: In some cases, the model number may also appear on the outside of the panel, especially for newer or commercial panels .

Expressing the Model Number

• Exact Reproduction: Always write the model number exactly as it appears, including any hyphens, letters, or numeric codes. For example, a label might read Siemens QP 200A 12-CIRCUIT—this full string is the model identifier .
• Include Manufacturer: When documenting or ordering parts, include the manufacturer name along with the model number to avoid confusion.
• Reference in Documentation: If labeling circuits or creating a home electrical diagram, the model number can be used as part of the equipment identification for clarity and compliance with standard numbering practices .

Safety Considerations

• Turn Off Power: Never touch internal components without ensuring the main breaker is off.
• Consult a Professional: If unsure, a licensed electrician can safely locate and verify the model number .

Summary

To express the model number of a household electrical distribution box, locate the manufacturer's label on the panel door or inside the box, and record the full alphanumeric string exactly as printed, including any suffixes or codes. Always pair it with the manufacturer name for clarity, and follow safety precautions when inspecting the panel .