Type SH 5kV–35kV Single-Core Shielded Mining Cable

Where high-current medium-voltage power must be routed through tight mobile substation skids, open-pit dragline/shovel phase drops, portable switchgear jumpers, tunnel boring transformer interconnects or temporary mine power bypasses, three-conductor Type SHD-GC cables above 250 kcmil become too heavy and rigid to handle manually. Single-Conductor (1/C) Type SH Shielded Portable Mining Cable splits the three phases into individual flexible shielded single-core cables rated at 5 kV, 8 kV, 15 kV, 25 kV and 35 kV.

Designed and manufactured to ICEA S-75-381 / NEMA WC 58 (100% grounded insulation level), each Type SH cable starts with a rope-lay-stranded annealed tinned-copper conductor per ASTM B33 and B172 (133 strands on 6 AWG up to 1221 strands on 500 kcmil) covered by a thermosetting Extruded Strand Shield (ESS) and corona-resistant 90 °C Ethylene Propylene Rubber (EPR) insulation with nominal walls from 0.110 in (5 kV) up to 0.345 in (35 kV).

Unlike fixed Type MV-105 cables that use rigid helically applied copper tape shields (which buckle and fatigue when flexed repeatedly), Type SH portable cables utilize a flexible coated-copper and textile composite braid shield over the semi-conducting insulation shield—delivering 100% electrostatic stress control with high-flex fatigue life.

Over a self-fusing rubber separator tape, a reinforced two-layer extra-heavy-duty lead-cured Chlorinated Polyethylene (CPE) jacket protects the shield and dielectric against rock impact, abrasion, oil, moisture and sunlight from −40 °C to +90 °C.

For Canadian open-pit shovels, draglines, and mobile reeling machines specifying CSA C22.2 No. 96 braided ground-check (SHD-BGC), anti-torsion reeling (SHD-R), or semi-conductive polymeric phase screen (SHD-SP) constructions from 2 kV to 35 kV, review: CSA Type SHD-BGC, SHD-R and SHD-SP Shielded Mining Cable.

Explore the mining and tunneling cable range for related configurations.

Construction

The representative telescopic cutaway illustrates a single-conductor Type SH medium-voltage shielded portable mining cable built to ICEA S-75-381, showing the rope-lay tinned-copper conductor, black extruded semi-conducting strand shield (ESS), thick EPR dielectric wall, semi-conducting insulation shield, woven tinned-copper/textile composite braid shield and reinforced two-layer lead-cured black CPE jacket.

Applications

Specify Single-Conductor Type SH cable for flexible medium-voltage single-phase drops, mobile substation jumpers, portable switchgear connections and high-amperage mine bypass feeds from 5 kV to 35 kV.

• Single-phase flexible power drops and boom/gantry jumpers on large open-pit electric stripping shovels, loading shovels and walking draglines.
• Mobile mine substation skids, portable capacitor banks, transformer primary/secondary leads and temporary medium-voltage bypass lines (5 kV to 35 kV).
• High-current parallel feeder runs in underground and surface mines where single-conductor cables (up to 688 A per conductor at 500 kcmil) simplify pulling and termination.
• Medium-voltage test bays, generator load-bank hookups and portable shore-to-pit power distribution.

Specifications

*Note on 8000 V table (Catalog p. 19): the source catalog prints 0.115 in alongside 3.81 mm (0.150 in equals 3.81 mm per ICEA 8 kV 100% wall, while 0.115 in equals 2.92 mm) and prints decimal points inside the strand counts (2.59–12.21 for 259–1221 strands); both values are preserved above for datasheet traceability.

**Sizes marked with double asterisks (500 kcmil at 25 kV; 350 kcmil and 500 kcmil at 35 kV) require extra-heavy-duty 0.205 in (5.21 mm) CPE jackets.

Ampacities are based on single-conductor free-air operation at 90 °C conductor temperature and 40 °C ambient air per ICEA S-75-381 / NEMA WC 58.

Stress-relief cones must be installed at all medium-voltage Type SH shield terminations, and the copper/textile braid shield must be grounded at least at one end (and preferably at all terminations and splices).

Standards

NEMA / ICEA S-75-381 (NEMA WC 58) medium-voltage portable mining cable standard