RG-ES206GS-P Series Switches Hardware Installation and Reference Guide   Appendix D — Cabling Recommendations 
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  Hard  power  cords  should  be  fastened  in  the  terminal  connection  area  to  prevent  stress  on  terminal 
connection and cable. 
  Do not use self-tapping screws to fasten terminals. 
  Power cords of the same type and in the same cabling direction should be bundled up into cable bunches, 
with cables in cable bunches clean and straight. 
  Bundle up cables by using cable ties. 
Cable Bunch Diameter (mm) 
80–150 mm (3.15–5.91 in.) 
10–30 mm (0.394–1.18 in.) 
150–200 mm (5.91–7.87 in.) 
200–300 mm (7.87–11.81 in.) 
  Do not tie cables or bundles in a knot. 
  For wiring terminal sockets (such as circuit breakers) with cord end terminals, the metal part of the cord end 
terminal should not be exposed outside the terminal socket when assembled.