What are the materials used in duct patti pvc wiring and where are they installed? in hindi/urdu

What are the things used in duct patti pvc wiring and where are they installed with details in Urdu.
پٹی ڈکٹ والی وائرنگ میں کون کون سی چیزیں استعمال ہوتی ہیں اور کہاں کہاں لگی جاتی ہیں اردو میں تفصیل کے ساتھ
Electrical pvc patti duct.
Pvc patti duct electric.
Electrical pvc duct patti all materials names.
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how to electric wiring pvc duct patti.
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casing pvc wiring materials names.
electrical pvc casing materisls names.
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(Fawaz Electric)