- JIS C 8305 : 1999 (Japan Industrial Standard)
- Japanese Industrial Standard JIS C8305 certified by the Conformity Certification Center (Quacert) under the General Department of Standards, Metrology and Quality.
- White
- Pre - Galvanized Steel - Class 3
- Hot - dip Galvanized Steel - Class 4
- G.I JIS C 8305 type E also known as smooth conduit, thin, and non - threaded.
- G.I JIS C 8305 type E conduit and fittings are linked together by a set screw or the tightening force of the fitting depending on the purpose of use.

- Steel Conduit JIS C 8305:1999 Type E is a type of steel conduit that is commonly used for electrical wiring in Japan and other countries that follow Japanese Industrial Standards (JIS). It is a high-quality, steel conduit that is designed to provide protection for electrical cables and wiring systems against physical damage and environmental factors.
- JIS C 8305:1999 Type E steel conduit is commonly used in a variety of electrical applications, including:
1. Residential and commercial buildings
2. Industrial facilities
3. Power distribution systems
4. Outdoor lighting and electrical systems
- JIS C 8305:1999 Type E steel conduit is available in a variety of sizes and lengths to suit different applications. It is typically installed using threaded fittings and is known for its durability, strength, and resistance to impact and corrosion.

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Steel Conduit JIS C 8305 Type E - VIETNAM CVL®
Manufactured according to JIS C 8305 (Japan Industrial Standard)
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Product Code
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Size
(mm)
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OD
(mm)
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Thickness
(mm)
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Length
(mm)
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Galvanized Steel - Class 3 (*)
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Hot - dip Galvanized Steel - Class 4 (**)
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E19
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E19NN
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19
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19.1
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1.2
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3660
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E25
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E25NN
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25
|
25.4
|
1.2
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3660
|
|
E31
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E31NN
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31
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31.8
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1.4
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3660
|
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E39
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E39NN
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39
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38.1
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1.4
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3660
|
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E51
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E51NN
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51
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50.8
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1.4
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3660
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Tolerance - Outside Diameter: ± 0.3 mm.
- Thickness: ± 10%.
- Length: ± 6.4 mm.
(*) The average thickness of the zinc coating layer for Pre-galvanized steel - Class 3 is ≤ 20 microns.
(**) The thickness of the zinc coating layer for Hot-dip galvanized steel Class 4 is ≥ 45 microns (ASTM A123).
MORE: Distinguishing between Pre-galvanized Steel Conduit and Hot-dip galvanized Steel Conduit
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