Whether 24V needs a junction box depends on the context and what it's connected to.
Based on the provided reference, 24V DC itself doesn't inherently need a junction box. However, a junction box is required to house the connection of a 120V AC wire to a 12-24V DC power converter (driver).
Here's a breakdown:
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Scenario Requiring a Junction Box: If you are converting 120V AC power to 24V DC using a power converter (also known as a driver), the 120V AC connection must be inside a junction box.
- Reason: Safety. Junction boxes provide a grounded, fireproof enclosure.
- Benefit: Prevents loose wire nuts, short circuits, and electrical fires.
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Scenario Where It May Not Be Required (But Recommended): If you are simply connecting two 24V DC wires, a junction box might not be strictly required by code in all situations, but using one is still a good safety practice.
- Example: Connecting 24V DC LED lighting to a 24V DC power supply. While you could potentially use wire connectors and insulate them well, a junction box offers a more professional and safer installation.
Why Use a Junction Box?
Even when not explicitly required, junction boxes offer several advantages:
- Safety: They contain sparks and prevent electrical fires.
- Organization: They keep wiring neat and organized.
- Accessibility: They provide easy access for future maintenance and troubleshooting.
- Protection: They protect wiring from physical damage.
Summary Table
| Voltage Connection | Junction Box Required? | Reason |
|---|---|---|
| 120V AC to 12-24V DC Power Converter | Yes | Safety, fire prevention, code compliance |
| 24V DC to 24V DC (Direct Connection) | No (But Recommended) | Enhanced safety, organization, and protection. Local codes may still require it in specific scenarios. |
In conclusion, while 24V DC wiring might not always require a junction box, it's best practice to use one, especially when dealing with a voltage conversion from 120V AC. Always consult local electrical codes for specific requirements in your area.
