The code isn't very practically helpful (NEC and CEC). Are there better comprehensive references?
So I bond a permanently installed platform in a basement that is nowhere near energized conductors? Some clients are concerned about induced voltages for absurb reasons. Do I go through the efforts of explaining the risks (or lack of) or just increase my price
Do I go ahead and bond the door frame to the building grounding loop? Why? Should I them not be concerned that the hinges might not be perfectly conductive over the lifespan of the installation and start getting concerned about the door handle bonding?
Do I bond steel cladding, at what interval? Do I concern myself about the conductivity of bolted connections and galvannized surfaces? Do I bond crane beams overhead that reasonably will never be accidentally exposed to an energized conductor?
Do I bond each piece of unistrut where the conduit on it is PVC instead of metallic conduit?
At what point do I consider that the steel of an A frame or dead end isn't bonded (e.g. lattice pieces)? Some clients won't accept mechanically bolted connections. Do I need to run a copper braid or bond between each section? Who can tell me 15 years from now that the 234th piece of 3000 won't be a touch potential risk?
Seems like this is a poorly understood or over engineered approach without any real guidelines or standard practice. Engineers are guided by IEEE 80 and NEC/CEC, including IEC standards. The easy answer is to "bond everything" but that's a lazy and wasteful approach, and further contributes to confusion.
Outdoors is fairly straightforward but indoors is another issue entirely for most clients.
A down to earth guideline for bonding could save a lot of £&$s on copper
What was been your experience?
So I bond a permanently installed platform in a basement that is nowhere near energized conductors? Some clients are concerned about induced voltages for absurb reasons. Do I go through the efforts of explaining the risks (or lack of) or just increase my price
Do I go ahead and bond the door frame to the building grounding loop? Why? Should I them not be concerned that the hinges might not be perfectly conductive over the lifespan of the installation and start getting concerned about the door handle bonding?
Do I bond steel cladding, at what interval? Do I concern myself about the conductivity of bolted connections and galvannized surfaces? Do I bond crane beams overhead that reasonably will never be accidentally exposed to an energized conductor?
Do I bond each piece of unistrut where the conduit on it is PVC instead of metallic conduit?
At what point do I consider that the steel of an A frame or dead end isn't bonded (e.g. lattice pieces)? Some clients won't accept mechanically bolted connections. Do I need to run a copper braid or bond between each section? Who can tell me 15 years from now that the 234th piece of 3000 won't be a touch potential risk?
Seems like this is a poorly understood or over engineered approach without any real guidelines or standard practice. Engineers are guided by IEEE 80 and NEC/CEC, including IEC standards. The easy answer is to "bond everything" but that's a lazy and wasteful approach, and further contributes to confusion.
Outdoors is fairly straightforward but indoors is another issue entirely for most clients.
A down to earth guideline for bonding could save a lot of £&$s on copper
What was been your experience?
