Low Voltage Circuits

Application of the Material in this Chapter                                                                                                                                                                                                                                                          This IRC chapter applies to low voltage circuits such as door bells, thermostats and HVAC control circuits, security and fire alarm systems, intercom systems, and garage door opener controls. These circuits usually operate at not more than (≤) 30 volts. This chapter does not apply to communication circuits such as cable and satellite TV, broadband cable TV systems, and telephone systems. Read the full Topic