Which is a wiring method that uses knobs, tubes and flexible non-metalic tubing for the protection and support of single insulated conductors concealed in hollow spaces of walls ceiling of buildings?
A. knob and tube wiring
B. Open wiring on insulators
C. Concealed knob and tubes
D. Open wiring with knob and tubes
Answer:C
Which is a wiring method that uses knobs, tubes and flexible non-metalic tubing for the protection and support of single insulated conductors concealed in hollow spaces of walls ceiling of buildings?
A. knob and tube wiring B. Open wiring on insulators C. Concealed knob and tubes D. Open wiring with knob and tubes