12/3/3 MC Cable – Dual Circuit Metal Clad Cable with Dedicated Neutrals
12/3/3 MC Cable is a specialty metal-clad cable designed for running two separate branch circuits with dedicated neutral conductors in commercial and residential buildings. It features six total conductors: three ungrounded (hot) wires, three grounded (neutral) wires, and a ground, making it ideal for code-compliant multi-circuit installations with shared armor protection.
Common Uses for 12/3/3 MC Cable
- Feeding three 120V circuits with dedicated neutrals
- Multi-circuit branch wiring in office buildings
- Kitchens, bathrooms, and areas requiring AFCI or GFCI breakers
- Reduced conduit fill and simplified cable management
- Commercial installations where neutral sharing is not permitted
Why Choose 12/3/3 MC Cable?
- Dedicated Neutrals: Ensures compatibility with AFCI and GFCI devices and compliance with NEC 210.4
- Efficient Routing: One cable handles three circuits, reducing labor and material costs
- Durable Construction: Metal armor protects against physical damage
- Easy Identification: Striped neutrals match each ungrounded conductor for safety and code compliance
Frequently Asked Questions
Q: What does '12/3/3' mean in MC Cable?
A: It means the cable contains 3 hot conductors and 3 matching neutral conductors, all 12 AWG, plus a ground wire—suitable for three separate 120V branch circuits.
Q: Can 12/3/3 MC Cable be used with AFCI/GFCI breakers?
A: Yes. Since each hot has its own dedicated neutral, it fully supports AFCI/GFCI protected circuits.
Q: What’s the difference between 12/3 and 12/3/3 MC Cable?
A: 12/3 MC Cable has one neutral shared among three hots, which may not be allowed in certain code applications. 12/3/3 MC Cable provides a separate neutral for each circuit, ensuring full code compliance.
Q: Where is 12/3/3 MC Cable typically used?
A: It's widely used in multi-unit residential, hotels, schools, and commercial buildings where space is limited and multiple circuits are needed in a single run.
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