25kV Medium Voltage URD Repair Joint
For single-core 25-28kV, extruded dielectric bare & jacketed concentric neutral power cables

The Innovative Power Products, Inc. MVJ 250UDR and MVJ 250T UDRJ series joints are heatshrinkable systems for splicing faulted bare or jacketed concentric neutral cable or cable joints. It 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 tubings reinstate the cable insulation across the joint and insulating shielding tubing reshields the joint and forms an internal seal to the cable semiconductive layer. A stainless steel constant force spring clamps the neutral wires to the joint. For jacketed concentric neutral cable, a tough abrasion resistant black jacketing tube or wraparound sleeve provides the joint with external moisture seals and mechanical protection.

MVJ 250UDR and 250T UDRJ kits provide a lightweight, compact and environmentally sealed system for splicing bare or jacketed concentric neutral cable. These features allow the installation of this jointing system in duct systems, vaults, submersible or directburied applications. This joint is ideal for almost any non-tension application. 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 lifetime performance. MVJ 250UDR and 250T UDRJ joints’ performance is based on the design and testing of the MVJ 250 series joint for metallic tape and wire shielded power cables.

    MVJ kits are designed to meet or exceed the requirements of sthe applicable sections of the following cable/cable accessory standard IEEE-404.

  • MVJ 250UDR and 250T UDRJ kits cover a wide range of conductor sizes. They accommodate out-of-round or off-tolerance cables. The MVJ 250UDR and 250T UDRJ kits can be used for size transitions within the actual kit’s cable use range. Two (2) kit sizes cover all cable sizes from #2 AWG through 500 kcmil. When preparing the cable ends, pencilling of the insulation is not required.

Electrical Specifications: 25kV Related Joints
Test Requirement
Value MVJ 250UDR(J)
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 > 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
Spring Clamp, S.S.
1 per kit UDJ Kits Only
Black Jacketing Tube or Wraparound Sleeve***
1 per kit UDJ Kits Only
Cable Preparation Kit
1 per kit P - Pmod Kit**
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.

MVJ 250UDR and MVJ 250T UDRJ factory engineered kits are individually packaged single-core cable joints. Everything is included to splice/repair one single-core cable or joint failure less the butt-splice connectors. Connectors can be supplied in the kits; subject to factory quote.

  • MVJ 250UDR & 250T UDRJ series: Price List PL-646

25kv Selection Guide
Conductor Range
Catalog #



Jacket Diameter Max. Connector
Length Max.
Connector O.D.
Length Max.
Bare Concentric Neutral Cable Joint
2 - 4/0 AWG
0.80 1.20 N/A 10.00 0.85 26.0
250 - 500 kcmil
1.05 1.45 N/A 10.00 1.35 26.0
Jacketed Concentric Neutral Cable Joint
2 - 4/0 AWG
0.80 1.20 1.50 10.00 0.85 40.0
250 - 500 kcmil
1.05 1.45 1.90 10.00 1.35 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 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:

P - cable cleaning kit (Pmod)
Example 1:
1/C, 1/0 AWG, 25kV bare concentric neutral cable spliced or repaired, with a cable cleaning kit:

  Example 2:
1/C, 250 kcmil, 25kV jacketed concentric neutral (JCN) cable or a damaged section repaired:

* 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