WHY LECTROWELD EXOTHERMIC JOINTS SHOULD BE USED IN PREFERENCE
TO BRAZED AND CRIMPED JOINTS IN ELECTRICAL EARTHING APPLICATIONS
SIZING OF CONDUCTOR AND APPROPRIATE CONNECTOR/JOINT
The connections between elements in an earthing system are normally the limiting factor in the utilization of the earthing conductors. The
temperature limits are recommended for various common connection types are shown in the table below.
The most comprehensive reference for the choice and selection of conductor size and respective method of joining
conductors used in ‘earthing’ applications (grounding) for sub-stations is the IEEE 80 standard.
These standards have in the main been adopted by Eskom alongside the SANS standards.
With specific reference to IEEE 80 Equation 37, (adjusted for metric) is:
WHY LECTROWELD EXOTHERMIC JOINTS SHOULD BE USED IN PREFERENCE
TO BRAZED AND CRIMPED JOINTS IN ELECTRICAL EARTHING APPLICATIONS
LECTROWELD SPECIFICATION
All connections in the earthing system shall be LECTROWELD exothermically welded joints. This shall include, but not be limited to, cable to
cable, cable to earth rod, cable to structure as well as all flat tape joints. |
