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19 Min Read
BS 6708 Type 21 Trailing Cable
Technical Department
on17/11/2025

What is BS 6708 Type 21 Trailing Cable?

BS 6708 Type 21 mining cable represents an advanced variant of galvanized steel pliable wire armoured flexible cables specifically engineered for demanding mining and quarrying applications requiring a dedicated fourth earth conductor. This four-core configuration distinguishes Type 21 from the three-core Type 20, providing enhanced safety features and compliance with electrical regulations that mandate separate protective earth conductors in mining installations. Key Identification: Type 21 cables feature four unscreened cores (three phase conductors plus one earth conductor) laid up around an elastomeric cradle without contacting each other, protected by galvanized steel pliable armour between inner and outer sheaths. Rated at 640/1100V with a 3kV test voltage, these cables are designed for use in deep mines where explosive gases and dust can accumulate, as well as surface operations supplying excavating, crushing machines and equipment.
20 Min Read
Type 20 BS 6708 Mining Cable
Technical Department
on17/11/2025

What is Type 20 BS 6708 Mining Cable?

BS 6708 Type 20 mining cable represents a specialized category of galvanized steel pliable wire armoured flexible cables engineered for the most demanding mining and quarrying applications. This cable type is characterized by its robust construction featuring three unscreened cores laid up around an elastomeric cradle without contacting each other, protected by galvanized steel pliable armour that provides exceptional mechanical protection while maintaining the flexibility essential for mobile mining equipment applications. Key Identification: Type 20 mining cables are classified within BS 6708 as cables with galvanized steel pliable wire armouring, featuring unscreened cores and a rated voltage of 640/1100V. These cables are specifically designated for use in deep mines where explosive gases and dust can accumulate, as well as surface operations for supplying excavating, crushing machines, and equipment requiring robust mechanical protection.
26 Min Read
MSHA Mining Cable: Comprehensive Technical Guide Professional Mining Power Cables Complying with US Mine Safety & Health Administration Standards
Technical Department
on12/11/2025

MSHA Mining Cable: Comprehensive Technical Guide

MSHA mining cables represent a specialized category of industrial power cables specifically designed, tested, and approved for use in mining operations under regulations established by the United States Mine Safety and Health Administration (MSHA). These cables serve critical functions in both underground and surface mining environments, delivering electrical power to mobile equipment, continuous miners, draglines, shuttle cars, and various other mining machinery while maintaining the highest standards of safety in potentially hazardous atmospheres.