In daily supervision and inspection, it is found that emergency lighting fixtures cannot be used normally due to incorrect wiring methods. All emergency lighting fixtures should be equipped with dedicated lines, and no switches should be installed in the middle. Two-wire and three-wire emergency lamps can be unified on a dedicated power supply. The setting of each dedicated power supply shall be combined with the corresponding fire protection regulations. If the emergency power supply rotates separately from the lamp, the electrical connection of the automatic emergency lamp should use high temperature resistant wires to meet the fire protection requirements.

Two-wire system

This connection method is a common connection method for special emergency lamps. It is suitable for emergency lamps that are not used for lighting or for continuous lighting for 24 hours (CED marker lamps belong to this type). After the power is cut off, the emergency lamp will automatically light up.

Three-wire system

The connection method is a commonly used connection method for emergency lights, which can control the on or off of the usual lighting status of emergency lights. When the power grid is cut off, the emergency lights will be lit immediately for emergency. K is the usual lighting switch.

Three-wire system precautions

1. The characteristics of various wiring methods must be accurately mastered, so as to avoid blind wiring and fail to play its due role;

2. If emergency lighting is used as part of usual lighting, three-wire controllable connection should be adopted.

3. For multi-storey public buildings, if there is no control center, emergency lighting fixtures in various parts can be controlled by local switches (single lamp single control or multi-lamp control) or centralized control in the distribution box three-wire connection method .

4. There is a fire control center project, in order to meet the requirements of the fire control center to open fire emergency lighting on the fire floor and related floors when a fire occurs.