25kV, 3/C Medium Voltage Joint
Straight joint for three-core 22-28kV, extruded dielectric shielded power cables

The Innovative Power Products MVJ 3250T series joint is a heatshrinkable system for jointing three-core shielded 25kV (22-28kV) extruded dielectric medium voltage power cable. The kit has field control material to control electrical stress over the connectors and at the shield cutbacks and provide internal moisture seals. Insulating tubing and shielding tubing reinsulate and reshield the areas over the spliced conductors. Tinned copper mesh and braid reestablish the shielding across the joint. A tough abrasion resistant black jacketing tube or wraparound jacketing sleeve provides the joint with external moisture seals and mechanical protection.

MVJ 3250T kits provide a lightweight, compact, and environmentally sealed system for splicing three-core extruded dielectric shielded power cable. These features allow the installation of this jointing system in duct systems, vaults, submersible or direct-buried applications. This system provides a total environmental seal; joint failures in flooded vaults are eliminated.

  • MVJ 3250T kits are factory engineered to provide fast and easy installations with reliable performance.

    All MVJ kits are designed to meet or exceed the requirements of the applicable sections of the following cable and cable accessory standards: IEEE-404, IEEE-48, ICEA-66-524, ICEA-66-516, and ANSI C119.2.

  • MVJ 3250T kits cover a wide range of conductor sizes and shapes. They accommodate out-of-round or off-tolerance cables, in both round and sector shaped conductors. The standard kits fit all cable constructions including: metallic tape, drain wire shielded or Unishield® power cable. The MVJ 3250T kits can be used for size transitions within the actual kit’s cable use range. Three (3) kit sizes cover all cable sizes from 2 AWG through 1000 kcmil. When preparing the cable ends, no pencilling of the cable insulation is required.

Electrical Specifications: 25kV Rated Three-core Joints
Test Requirement
Value MVJ 3250T
AC withstand, 1 minute (60 hz)
52 kV PASS
DC withstand, 15 minutes
100 kV PASS
Partial Discharge (Corona) Voltage (<3pC)
21.6 kV >21.6 kV
Impulse withstand 1.2 x 50 μs (crest kV)
150 kV > 150 kV
AC withstand 1 hour (60hz)
78 kV PASS
AC withstand 5 hour (60hz)
52 kV PASS
Continuous current rating
= Cable = Cable
Cyclical Submersion test (ANSI C119.2)
Pass 52 cycles Pass 52 cycles
Bill of Materials: Std. Pkg.: 1 kit = 1 each, 3/C Joint
Item Description
Quantity Supplied
MVJ 250 Joint (no jacket)
3 per kit In All Kits
Tinned Copper Braid
3 per kit In All Kits
Constant Force Spring
6 per kit In All Kits
Tinned Copper Mesh
As Required In All Kits
Black Jacketing Tube or Wraparound Sleeve***
1 per kit In All Kits
Sealed Grounding Kit
1 per kit G - Gmod Kit**
Cable Preparation Kit
1 per kit P - Pmod Kit**
Butt-Splice Connector
3 per kit Factory Quoted*
Ground Connectors
As Required Factory Quoted*
Installation Guide
1 per kit In All Kits

  • To download a PDF copy of the data sheet Click here.

    For a complete PDF of the current IPP catalog Click Here. If you would like the catalog in a printed version, please go to the "Catalog Request" page via the link at the top of the page.

These factory engineered kits are supplied with everything that is necessary to rebuild the cable including ground braids and constant force springs. The braids are internal to the joint and do not have sufficient length for external grounding.

The MVJ 3250T kits are individually packaged, three-core shielded cable joints. Everything is included to splice one three-core cable, with or without grounds, less the external grounding hardware and butt-splice and ground wire connectors. External grounding components can be included as a kit option. Connectors can be supplied in the kits; subject to factory quote. See section 5 for connector information.

  • MVJ 3250T series: Price List PL-649

25kv Selection Guide
Conductor Range
Catalog #



Length Max.
Connector O.D.
Length Max.
2 - 250 kcmil
MVJ 3251T
0.80 1.20 3.75 1.00 63.0
300 - 500 kcmil
MVJ 3252T
1.05 1.45 5.50 1.35 67.0
750 - 1000 kcmil
MVJ 3253T
1.40 1.85 8.00 1.85 72.0

All dimensions in inches unless shown otherwise

Ordering Information

1. Find your cable size in the selection guide above and identify the kit catalog number. This kit will be all that is needed to splice one three-core cable less the phase and ground wire connectors. Confirm the dimensions when at the extremes of the size range.
2. Add the mod kit letter designation as needed to change the base kit:

G - sealed grounding kit (Gmod)
P - cable cleaning kit (Pmod)
Example 1:
To splice a 3/C, 25kV, 1 AWG cable to the same cable size and construction:
MVJT 3251T

  Example 2:
To splice a 3/C, 25kV, 350 kcmil cable to a 3/C, 25kV, 500 kcmil cable with a cable cleaning kit:

* CONNECTORS: To have connectors supplied in the kits, please refer to Section 5 in this catalog for connector selection information. The connectors must be ordered separately but can be packaged within the kits if detailed information is supplied.
** Supplied if specified.
*** WRAPAROUND SLEEVE with stainless steel channel– Contact IPP for more information.

QUESTIONS OR QUOTES EMAIL US AT: sales@ippcorp.com or CALL TOLL FREE 1-800-544-4626