25kV, Medium Voltage Straight Joint
Straight joints for single-core 22-28kV, extruded dielectric shielded power cables

The Innovative Power Products MVJ 250T series joint is a heatshrinkable system for jointing shielded 25kV (22-28kV) extruded dielectric, medium voltage power cable. The kit uses special materials to control electrical stress over the connector and at the shield cutbacks, and provide internal moisture seals. A heatshrinkable field control tubing controls stress over the connector and shield cutbacks. Insulating and shielding tubes reinsulate and reshield the area over the spliced conductor. Tinned copper mesh and braid reestablish the metallic 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 kits provide a lightweight, compact and environmentally sealed system for splicing extruded dielectric shielded power cable. These features allow the installation of this jointing system in duct systems,vaults, submersible or direct-buried applications. The system is totally sealed; joint failures in flooded vaults are eliminated.

  • MVJ kits are factory engineered to provide fast and easy installation 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.

  • The MVJ 250T kits cover a wide range of conductor sizes and shapes. It will accommodate out-of-round or off-tolerance cables in both round and sector shaped conductor. The standard kit fits all cable constructions including: metallic tape, drain wire shield or Unishield® shielded power cables. The MVJ kits can be used for size transitions within the actual kit’s cable use range. Three (3) kits cover all cable sizes from 2 AWG through 1000 kcmil. When preparing the cable ends, pencilling of the insulation is not required.

Electrical Specifications: 25kV Related Joints
Test Requirement
Value MVJ 250T
AC withstand, 1 minute (60 hz)
52 kV PASS
DC withstand, 15 minutes
10 kV PASS
Partial Discharge Extinction (Corona) Voltage (<3pC)

21.6 kV

>21.6 kV
Impulse withstand 1.2 x 50 μs (crest kV)
150 kV > 150kV
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, 1/C joint
Item Description
Quantity Supplied
Field Control Material
As Required In All Kits
Field Control Tube
1 per kit In All Kits
Insulating Tube
As Required In All Kits
Shielding Tube
1 per kit In All Kits
Shielding Braid & 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
1 per kit 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.

The MVJ factory engineered kits are individually packaged single-core shielded cable joints. Everything is included to splice one single-core cable less the butt-splice connector and external grounding components. External grounding components can be included as a kit option. Connectors can be supplied in the kits; subject to factory quote.

  • MVJ 250T series: Price List PL-647

15kv Selection Guide
Conductor Range
Catalog #






O.D. Max.
Length Max.
2 - 250 kcmil
MVJ 251T
0.80 1.20 3.75 1.00 27.0
300 - 500 kcmil
MVJ 252T
1.05 1.45 5.50 1.35 36.0
750 - 1000 kcmil
MVJ 253T
1.40 1.85 8.00 1.85 40.0

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 single-core cable, less the butt-splice connector and shield grounding hardware. 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:
For a 1/C, 25kV, 1/0 AWG cable spliced to the same exact cable with a solderless grounding kit (G mod) and a cable cleaning kit:

  Example 2:
For a 1/C, 25kV, 250 kcmil, cable spliced to a 1/C, 25kV, 500 kcmil cable with cable cleaning kit:
Note: for 28kV joint selection confirm dimensional data.

* 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