Decoding the Cable Code: What YJV, YJLV22 and YJV32 Actually Mean (11kV XLPE Cable Explained)

Time: 2026-09-02 08:48:37 Source: Henan Province Jianyun Cable Co., Ltd.

Cable Knowledge Series

A plain-language guide to medium voltage XLPE power cable type designations — what every letter and number means, how 11kV cable is built, and how to choose between armoured, unarmoured, copper and aluminum options.

Open a cable supplier's catalog and you'll run into names like YJV, YJLV22, or YJV32 — a string of letters and numbers that looks like it needs a decoder ring. In reality, it's a compact code, and once you know how to read it, you can tell the conductor material, insulation type, sheath material and armour type of a cable just from its name, without opening a datasheet.

This guide breaks that code down piece by piece, using 11kV XLPE medium voltage cable as the working example, and covers the standards behind it and how to choose the right variant for a project.

1. Why Cable Type Codes Exist

Medium voltage power cables — generally rated from 1kV up to 35kV — are built from several distinct layers: a conductor, insulation, and an outer sheath, sometimes with an armour layer added for mechanical protection. Rather than writing out a full description every time, the industry (particularly under Chinese GB/T and closely related IEC-based naming conventions) condenses this construction into a short alphanumeric code.

Once you can read the code, a name like YJV32 tells you almost everything about a cable's construction before you even see a spec sheet.

2. Decoding the Letters, One Piece at a Time

Each part of the code corresponds to a specific layer or material in the cable's construction:

Code Element	What It Means
(no letter) conductor	Copper conductor (the default — no letter needed)
L	Aluminum conductor
YJ	XLPE (cross-linked polyethylene) insulation
V	PVC sheath
Y (as sheath code)	PE (polyethylene) sheath
22	Steel tape armoured, PVC sheathed
23	Steel tape armoured, PE sheathed
32	Steel wire armoured, PVC sheathed
33	Steel wire armoured, PE sheathed

3. Putting It Together: Common Cable Types

Type Code	Full Construction
YJV	Copper conductor, XLPE insulated, PVC sheathed
YJLV	Aluminum conductor, XLPE insulated, PVC sheathed
YJY	Copper conductor, XLPE insulated, PE sheathed
YJLY	Aluminum conductor, XLPE insulated, PE sheathed
YJV22	Copper conductor, XLPE insulated, steel tape armoured, PVC sheathed
YJLV22	Aluminum conductor, XLPE insulated, steel tape armoured, PVC sheathed
YJV32	Copper conductor, XLPE insulated, steel wire armoured, PVC sheathed
YJLV32	Aluminum conductor, XLPE insulated, steel wire armoured, PVC sheathed

Notice the pattern: swap "V" for "Y" at the end and the sheath changes from PVC to PE; add "22" or "32" and you've added armour; drop in an "L" right after "YJ" and the conductor changes from copper to aluminum.

4. Standards, Voltage Grades and Ratings

11kV XLPE cable — along with other common medium voltage grades like 5kV, 15kV, 20kV, 25kV and 33kV — is typically manufactured under GB/T 12706.1, which is closely equivalent to IEC 60502-1, with BS, DIN or ICEA variants available depending on the destination market.

Parameter	Typical Value
Voltage Grade	1kV to 35kV (5kV, 11kV, 15kV, 20kV, 25kV, 33kV common)
Max. Continuous Conductor Temperature	90°C
Max. Short-Circuit Temperature	250°C (5 seconds maximum)
Minimum Bending Radius	Not less than 15 times the cable diameter
Cross-Sectional Range (this series)	120mm² to 400mm²

Indicative current-carrying capacity for a buried 3-core 11kV copper XLPE cable rises with cross-section — roughly in the range of 250-260A at 120mm² up to around 450-470A at 400mm², though the exact figure always depends on installation method, grouping and ambient/ground temperature, so a full ampacity table should be checked for the specific installation conditions.

5. How to Choose Between Variants

Copper or aluminum? Copper offers higher conductivity for a given size; aluminum is lighter and lower cost, often used where larger cross-sections are acceptable.
Armoured or unarmoured? Choose steel tape (22/23) or steel wire (32/33) armour for direct burial or where mechanical protection against impact is needed; unarmoured (plain V/Y types) suit cable trays, ducts or indoor installation.
PVC or PE sheath? PVC sheath is common and cost-effective for general use; PE sheath offers better moisture and chemical resistance, often preferred for underground or wet environments.
What voltage grade does the network require? Confirm the exact Uo/U rating needed (e.g., 11kV, 20kV, 33kV) — it determines insulation thickness and test requirements, not just the cable's name.
Flame-retardant requirements? Check whether the project specifies flame-retardant grade A, B or C under GB/T 19666 or IEC 60332, particularly for cables run through enclosed spaces.

6. Frequently Asked Questions

Q: What does the "22" in YJV22 actually stand for?
A: The number "22" indicates the cable has steel tape armour beneath a PVC outer sheath — the first digit generally relates to the armour type and the second to the sheath, following the standard designation system.

Q: Is YJV32 stronger than YJV22?
A: Steel wire armour (used in the "32" and "33" series) generally provides greater tensile and mechanical strength than steel tape armour (used in "22" and "23"), making wire-armoured types more suitable for direct burial in rocky or high-stress ground conditions.

Q: Can I tell the voltage rating from the type code alone?
A: No — the type code (like YJV or YJV22) only describes construction (conductor, insulation, sheath, armour); the voltage grade (such as 11kV or 20kV) is specified separately alongside the code.

Q: Why does aluminum conductor cable use an "L" instead of no letter?
A: Copper is treated as the default conductor material in this naming system, so no letter is needed; aluminum is the variation, so it gets marked explicitly with an "L".

Q: Is this naming system used outside of China?
A: This specific letter-code system is most closely associated with Chinese GB/T standards, though the underlying cable constructions it describes align closely with IEC 60502, meaning equivalent cables are widely available and understood internationally even where the naming convention differs.

Final Thoughts

A code like YJLV22 might look cryptic at first glance, but it's really just shorthand — aluminum conductor, XLPE insulation, steel tape armour, PVC sheath, all packed into six characters. Once the pattern clicks, reading a cable catalog becomes a lot faster, and choosing between copper vs aluminum, armoured vs unarmoured, or PVC vs PE sheath becomes a matter of matching the letters to the project's actual requirements.