What is a parallel groove (PG) clamp used for?
A parallel groove (PG) clamp joins two conductors laid side by side in a twin-groove body, clamped by a through-bolt. Typical uses: jumper-loop connections on tension poles, tap-off connections to spur lines or equipment, and parallel joints where a compression splice is not required. Silverstone Electric supplies aluminium PG clamps — for aluminium phase conductors — and steel PG clamps for steel earthwire and hardware duties, from Suzhou, China.
Evidence
- Catalog items — aluminium PG clamp and steel parallel groove clamp, both listed. Fittings catalog →
- Conductor context — used across AAC/AAAC/ACSR, ABC and XLPE distribution runs. Cable & conductor range →
- Line BOM — quoted as part of complete line-materials packages. Supplier overview →
Frequently asked
Aluminium or steel PG clamp?
Aluminium PG clamps suit aluminium phase conductors; steel versions suit steel earthwire, stay and hardware connections. Match the clamp material to the conductor to avoid galvanic corrosion at the joint.
Is a PG clamp a current-carrying joint?
Yes — it carries current across the parallel interface, so conductor surfaces must be clean and the bolt properly torqued; for highest-capacity or full-tension joints a compression splice is normally preferred.
What do you need to quote PG clamps?
Conductor type and size with the quantity; clamp size, material and per-unit packing are confirmed with the quotation.