brightidea
Member
- Location
- Ontario Canada
Is it now a requirement in your area to pull separate grounding conductors through all conduits, including rigid metal pipe, IMC, EMT, and ofcourse PVC.
How about metalic sheathed cables, do they require bonding bushings with attached lugs to conect and bond the sheath of the cable with the rest of an installation? If so at both ends?
Most installations that use metalic conduits have no ground wire pulled through, since metal is a good conductor and could be used as the grounding conductor. Today, practices are changing and much work is being done with a seperate grounding conductor pulled in addition to the conductive properties of the conduits being used as mechanical protection.
What is the practice that are being used in your area, and what is required by code?
Grounding theory often confuses me, in regards to safety purposes, for it is supposed to provide protection from personal injury and damage to property.
But when you get into fault currents, which can be a much higher magnitude of the regular circuit conductors capacity, it is almost impracticable to size grounds to safely handle such currents.
It is undertstood that overcurrent protection, such as fuses and breakers help with this issue, but when is it determined safe enough?
Under a specific ammount of time.
Ive been shocked before multible times but never carried a full fault current through my body that I know of.
What is would be the effect of a person being in contact of a grounding wire during a fault?
How about metalic sheathed cables, do they require bonding bushings with attached lugs to conect and bond the sheath of the cable with the rest of an installation? If so at both ends?
Most installations that use metalic conduits have no ground wire pulled through, since metal is a good conductor and could be used as the grounding conductor. Today, practices are changing and much work is being done with a seperate grounding conductor pulled in addition to the conductive properties of the conduits being used as mechanical protection.
What is the practice that are being used in your area, and what is required by code?
Grounding theory often confuses me, in regards to safety purposes, for it is supposed to provide protection from personal injury and damage to property.
But when you get into fault currents, which can be a much higher magnitude of the regular circuit conductors capacity, it is almost impracticable to size grounds to safely handle such currents.
It is undertstood that overcurrent protection, such as fuses and breakers help with this issue, but when is it determined safe enough?
Under a specific ammount of time.
Ive been shocked before multible times but never carried a full fault current through my body that I know of.
What is would be the effect of a person being in contact of a grounding wire during a fault?