Principles for the layout and design of terminal components

     For the same component, about the terminal layout should pay attention to the note to the large size and heavy Terminals installed in the electrical panels, and on the heating element should be installed in the upper portion of the electrical box (cabinet) or is at the back, but heat relay should be placed in the lower part, due to the thermal relay the outlet end of the directly connected to the motor easy to qualify,  And its incoming wire end and contactor are directly connected, easy to wire and make the shortest line, and suitable for heat dissipation. 
      Wiring terminal components layout design, also need to pay attention to strong and weak current separation and pay attention to shielding, to prevent external interference;  The installation positions of wiring terminals that need frequent maintenance, overhaul and adjustment should not be too high or too low. The installation positions of manually operated switches and instruments that need frequent monitoring should be in line with the principles of human engineering. 
     The arrangement of wiring terminal still should consider safety gap, when undertaking use later, also must want to accomplish neat, beautiful, symmetrical, the electric appliance with similar dimensions and structure should also want to be put together, facilitate processing, installation and wiring.  If the line groove is used, it should be appropriate to increase the distance between the electrical appliances, for wiring and maintenance. 
      After the position of each wiring terminal is determined, at this time we can directly draw the electrical layout.  The electrical layout will be drawn according to the contour of the terminal, that is, the axis shall be the criterion, and the spacing of each component shall be marked.  The installation size and tolerance range of each terminal should be marked according to the standard of the product manual to ensure the processing quality of the mounting plate and the smooth installation of each electrical appliance.