Scottf,
Adding a dummy burdens to bring VTS and CT to work within the accuarcy limits is a common practice in this part of the world, specially in revenue class metering applications.
I do agree 0 -100% accuracy requirements of IEEE would help in Voltage measurements but for current...
I am not familiar with American Standards. The VT must be loaded to 25 % of rated burden to make it work within the accuracy limits.This may entail adding dummy burdens. This is the case when electronic devices ( 1- 2VA budens) are used in conjuction with VT of high VA ratings.
Uno,
It is a common practice, in short runs of cables, (interconnection between a transformer and switchgear), to earth cable sheaths at one end. This arrangement do not compromise protection.
For long runs, the induced voltages under fualt condition will become too high and the cables sheats...
