Low-voltage electrical combination should comply with what kind of rules? A. heating element installed in a well-cooled position; B. fuse melt specifications, automatic switch settings meet the design requirements; C. switching platen contact is good, there is a safe distance between the adjacent platen, switching, do not touch the adjacent platen; D. Signal circuit lights, buttons, light plates, bells, electric flute, accident, such as the clock and signal display accuracy; E. The housing must be grounded (PE) or connected to zero (PEN), the connection is reliable; F. The terminal block is securely installed. The terminals are numbered, strong and weak. The terminals are isolated and the terminal specifications are matched with the cross-sectional area of ​​the core. Saddle Stitching Printing,Comic Printing Service,Printing A Comic Book,Print Ninjia Comic Printing Gold Union Printing , https://www.goldunionprinting.com