When metal wall panels are used in clean room, the clean room decoration and construction unit generally submits the switch and socket location diagram to the metal wall panel manufacturer for prefabrication and processing.
1) Construction preparation
① Material preparation: Various switches and sockets should meet the design requirements, and other materials include adhesive tape, junction boxes, silicone, etc.
② The main machines include: marker, tape measure, small line, line drop, level ruler, gloves, curve saw, electric drill, megohmmeter, multimeter, tool bag, toolbox, mermaid ladder, etc
③ Operating conditions: The construction and installation of the clean room decoration have been completed, and the electrical piping and wiring have been completed.
(2) Construction and installation operations
① Operation procedure: Switch and socket positioning, installation of junction box, threading and wiring, installation of switch and socket, insulation shake testing, and electrification trial operation.
② Switch and socket positioning: Determine the installation position of the switch and socket based on the design drawings and negotiate with various specialties. Mark the installation position of the switch and socket on the drawings. Location dimensions on the metal wall panel: According to the switch socket location diagram, mark the specific installation position of the switch gradient on the metal wall panel. The switch is generally 150-200mm from the door edge and 1.3m from the ground; The installation height of the socket is generally 300mm from the ground.
③ Installation of junction box: When installing the junction box, the filling material inside the wall panel should be treated, and the inlet of the wire slot and conduit embedded by the manufacturer in the wall panel should be properly treated for wire laying. The wire box installed inside the wall panel should be made of galvanized steel, and the bottom and periphery of the wire box should be sealed with glue.
④ Installation of switch and socket: When installing switch and socket, the power cord should be prevented from being crushed, and the installation of switch and socket should be firm and horizontal; When multiple switches are installed on the same plane, the distance between adjacent switches should be consistent, usually 10mm apart. The switch socket should be sealed with glue after adjustment.
⑤ Insulation shaking test: The insulation shaking test value should comply with standard specifications and design requirements, and the smaller insulation value should not be less than 0.5 ㎡. The shaking test should be conducted at a speed of 120r/min.
⑥ Power on test run: First, measure whether the voltage values between the phase and phase to ground of the circuit incoming line meet the design requirements, then close the main switch of the distribution cabinet and make measurement records; Then test whether the voltage of each circuit is normal and whether the current meets the design requirements. The room switch circuit has been inspected to meet the design requirements of the drawings. During the 24-hour trial operation of power transmission, conduct testing every 2 hours and keep records.
(3) Finished product protection
When installing switches and sockets, metal wall panels should not be damaged, and the wall should be kept clean. After the installation of switches and sockets, other professionals are not allowed to collide and cause damage.
(4) Installation quality inspection
Verify whether the installation position of the switch socket meets the design and actual on-site requirements, and the connection between the switch socket and the metal wall panel should be sealed and reliable; Switches and sockets in the same room or area should be kept in the same straight line, and the connecting wires of the switch and socket wiring terminals should be tight and reliable; The grounding of the socket should be good, the zero and live wires should be correctly connected, and the wires passing through the switch socket should have protective covers and good insulation; The insulation resistance test should comply with the specifications and design requirements.
Post time: Jul-20-2023