Ground Rise Potential (GRP) occurs in every instance in which an earthed network becomes live.
It may not always be possible to protect the pole top worker and the ground worker simultaneously.
To ensure the equipment is fit for purpose the fault level, peak factor and tripping times of the installation must be known
The inclusion of jointed steelwork in the short circuiting current path will result in slower tripping times and less protection for workers.
Short-circuiting devices should be maintained to a standard that ensures it is fit for purpose.