Class 2 Remote-Control, Signaling and Power-Limited Circuits

Cable TV and Telephone Wiring Are Low Voltage but Not Automatically Class 2

Can cable TV or telephone wires share holes and boxes with electrical wiring?

E4301.2

Class 2 Cable Must Be Supported and Protected from Damage

How should low-voltage cable be run through walls, attics, and basements?

E4303.2

Class 2 Conductors Usually Need Separation from Power Conductors

Can low-voltage wires be in the same conduit or box as 120-volt wiring?

E4303.4

Class 2 Transformers and Power Supplies Must Be Listed and Accessible

Can a doorbell or thermostat transformer be hidden in a wall?

E4302.1

Doorbell Wiring Is Usually a Class 2 Low-Voltage Circuit

Is doorbell wiring covered by electrical code?

E4301.1

Low-Voltage Landscape Lighting Still Needs a Listed Power Source and Proper Cable

Does low-voltage landscape lighting have to follow electrical code?

E4302.1

Security and Alarm Cables Need Class 2 Separation and Protection

What code applies to security system wiring in a house?

E4303.3

Thermostat Cable Must Stay Within the Class 2 Circuit Rules

Can I run thermostat wire myself for a furnace or smart thermostat?

E4303.1