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Identification of insulated wires by colors according to DIN 40705 and CEI/IEC 60446

Conductor identification
The conductor identification of different conductors such as Phase conductor, Mid-point conductor, PEN-conductor and Protective conductor are distinguished by the indicating letters and colors of the conductor.
An universal international norm exists only for the green-yellow grounding conductor.
For new installation it is not allowed to use the old conductor colors.


Conductor Designation Alphanumerical Type Color Identification Symbol
old new old new  
Alternating Current
Phase conductor 1
Phase conductor 2
Phase conductor 3
Mid-point conductor

R
S
T
MP

L1
L2
L3
N

black
red
blue
gray

not defined (preferred black1))
not defined (e.g. brown1))
not defined
light blue2)
 
Direct Current
Positive
Negative
Mid-point conductor

 L +
L -
M

+
-
 
not defined
not defined
light blue2)
 
Protective Conductor   PE   green-yellow3) Protective Conductor
Neutral conductor with protection   PEN   green-yellow3) Protective Conductor
Grounding   E   not defined Grounding
Ground for External Voltage   TE   not defined  
Load-Connecting Clamps   to L1
to L2
to L3
to N
    U
V
W
N

1)Application of conductors by colors “black“ or “brown“ for internal wiring of single conductor cables
For the internal wiring of apparatus, distributor boards and equipment with the insulated single conductors, only the “black“-color is preferred. Application of other colors or combinations of two other colors are also provided, if these for the purpose of manufacturing or services are necessary. If only an additional color for the individual identification of separated conductor group is necessary, the color “brown“ is preferred
2)Application of the color “light blue-
Where a circuit includes a neutral or mid-point conductor identified by color, the color used for this purpose shall be blue. In order to avoid confusion with other colors it is recommended to use an unsaturated color blue, called here “light blue“. Light blue shall not be used for identifying any other conductor where confusion is possible In the absence of a neutral or mid-point conductor, a conductor identified by light blue within the whole wiring system may also be used for any other purposes, except as a protective conductor.
If identification by color is used, bare conductors used as neutral or mid-wire conductors shall be either colored by a light blue stripe, 15 mm to 100 mm wide in each unit or enclosure and each accessible position, or colored light blue throughout their length.
3) Application of bi-color combination “green-yellow“ The bi-color combination green-and-yellow shall be used for identifying the protective conductor and for no other purposes. Green-and-yellow is the only color combination recognized for identifying the protective conductor, according to DIN VDE 0293. The combination of the colors green-and-yellow shall be such that, on any 15 mm length of the conductor where color coding is applied, one of these colors cover at least 30% and not more than 70% of the surface of the conductor, the other color covering the remainder of that surface.

If bare conductors, used as protective conductors, are provided with coloring they shall be colored green-and-yellow, either throughout the whole length of each conductor or in each compartment or unit or at each accessible position. If adhesive tape is used, only bi-colored tape shall be applied.

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Sealcon is the Exclusive Importer of HUMMEL products. We offer over 6,000 different Types and Sizes of RoHS Compliant Liquid Tight Strain Relief Fittings, Cord Grips, Cable Glands, Circular Connectors, Conduit System, Industrial Enclosures and Other Related Cable Management Products which are rated the best in the industry.
Liquid Tight Strain Relief, Cord Grips, Cable Gland FittingsLiquid Tight Strain Relief Fittings, Cord Grips, Cable Glands
Threads: PG, NPT, Metric, BSPP Threads
Materials: Nylon, Nickel Plated Brass, PVDF (for chemicals and extreme temperatures) & Stainless Steel, NEMA 4x and 6 (IP68, IP 69K).
Approvals: RoHS, Deca BDE, UR, UL, CE, CSA, VDE, German Lloyd, etc.
UL f1 (UL 746C) - Suitable for outdoor use with respect to exposure to ultraviolet light, water exposure and immersion in accordance with UL 746C
Circular ConnectorsCircular Connectors (M16, M23, RJ45, M27 and M40)
Sizes: M16 Signal, M23 Signal & Power, M27 Signal, M40 Power, M12/16 Twintus
Types: Twintus, RJ45 Industrial Ethernet, PoE Fast Ethernet, Push-Pull, Stainless Steel, Over Molded Cordsets, Standard/EMI Ready
Configurations: Signal (3-28 pole) & Power (6 & 8 pole)
Materials: Nickel Plated Brass, Stainless Steel and Aluminum
Approvals: RoHS, Deca BDE, UR, UL, CSA, TÜV, etc.
Hummel EnclosuresIndustrial Enclosures (Plastic & Metal)
Materials: Polycarbonate, ABS (Acryl-Butadiene-Styrene), Aluminum, Steel/Stainless Steel and Polyester.
Types: Gray or Transparent Lids, available with Hinges and Latches, Plain Walls or Knockouts.
Approvals: RoHS, Deca BDE, UL, CSA, TUV and CE. Modular, Expandable, UV and Impact Resistant, NEMA 4, 4x (IP 66/67). Solar Plus for Photovoltaic applications.
Our Enclosures can be equipped with Strain Relief Fittings, Circular Connectors or Conduit Fittings. Other customization options like cutting & drilling are also available.
Conduit SystemConduit System
High Pull-Out Resistance, Robust Performance, Long Life Expectancy, Fastest/ Easy installation, No Tools required!
Fittings:
Push-In, Turn-to-Seal, Snapclic DUO (Nylon or Nickel Plated Brass), Double-Seal, Flange/Bulkhead
Conduit:
Standard and Super Flex Corrugated Conduit
Accessories: Snap-In Mounting Brackets. NEMA 4 (IP 54/65)
Approvals: RoHS, Deca BDE, UR, German Lloyd, CE, etc.
Hazardous Location / Explosive Proof Cord Grips, Cable GlandsHazardous Location / Explosive Proof Cord Grips, Cable Glands
These fittings are labeled and approved to withstand the required needs of a combustible environment.
Materials: Nylon, Nickel Plated Brass, PVDF (chemical resistant & extreme temperatures), Stainless Steel.
Threads: NPT, Metric & PG. NEMA 4x (IP 67) and 6 (IP 68/69K)
Approvals:
RoHS, Deca BDE, UL, CSA, VDE, CE, EEx e, ATEX, German Lloyd, IECEx,
Ex-d/Ex-e, Ex-i
EXIOS - High-end Cable Glands for armored cables in hazardous areas including the latest IECEx and ATEX certifications, for use in Ex-e, Ex-d and Ex-tD areas
Adapters, Enlargers, ReducersThread Adapters, Enlargers, Reducers
Convert, Increase or Decrease your thread size with our newest product line of Adapters, Enlargers and Reducers.
Threads: NPT, Metric and PG.
Materials: Black or Gray Nylon, Nickel Plated Brass, Aluminum, Stainless Steel.
Approvals: RoHS, Deca BDE, CE, EEe x, ATEX, etc.
Hazardous / Explosive proof versions available.
Cable AccessoriesCable Accessories
Locking Nuts:Black & Gray Nylon, Nickel Plated Brass, Zinc Plated Steel, EMI (w/ Cutting Edges)
O-Rings: Buna-N, Viton®, Silicone
Seal Rings: Polyethylene / Fiber-reinforced Plastic
Hole Plugs: Dome, Hex, Nylon, Nickel Plated Brass
Inserts: Standard, Reduced, Multi-Hole, Romex®
Other Accessories: Ratchet & Socket Wrenches, Cable Clamps, etc.
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