Brsele
T-90 is not approved in Canada for wet locations. I know the US has thwn and thhn which are similar to t90.
It is not therefore approved for installation underground per table 19. Use RW or TW underground.
The placement of a bonding conductor in PVC for services or sub services can get accepted and rejected in BC. A previous codes interpretation guy for the BCSA's predecessor made it policy to require a bonding conductor in all PVC raceways.
In the current BCSA and here in Victoria I think most inspectors would not require a bonding conductor between the meter base and the panel as long as the grounding is done in the panel. If you installed a duplex meter and grounded in the meter base then you would have to install bonding conductors between the meter and panel(s) The other place where you can save the bonding conductor is for a sub feed to an out building where you establish a ground at the out building. IE you use a service entry switch or combo panel, bond the neutral and install a ground electrode. The fault path to the source is the grounded circuit conductor(neutral) A bonding conductor would in this case just provide a parallel return which can impose dangerous voltages on the non-current carrying parts of the system.
