电气接线标准

WORK INSTRUCTION
DKI GENERAL WIRING PRACTICES

1. Scope
This work instruction shall be applied in the Diamond Key International Workshops Electrical wiring
on skids or associated is required.

All wiring to be performed by qualified experienced wiring personnel using appropriate tools
for stripping insulation, cutting, soldering and attaching mechanical crimp type terminals with
the correct dies and tools as advised by the terminal manufacturer.

Foremost electrical installations are to be performed to latest issue of wiring rules AS/NZS
3000 as well as IEC directives

2. General installation:
2.1. When removing insulation from the conductor, wire strands shall not be nicked or
damaged. Proper stripping tools shall be used to avoid such damage.

2.2. Wire and cable ties shall be snug but shall not be so tight as to cause indentation
and cold flow damage to the insulation.

2.3. Cable ties shall be tensioned and trimmed using cable tie manufacturers tooling.
(Use of side cutters for trimming, is not permitted)
2.4. All wiring within Exe, Exi or similar enclosures to be terminated.
2.5. Where possible, adhesive installed mounting bases should not be used for ties or
cable support unless affixed with a mechanical fastener.

2.6. Wire and cable dress shall allow sufficient slack for removal and reapplication of the
wire terminations, at least twice without excess tension.

2.7. All wire and cable, including that in ducts and conduit, shall be handled to be free
from kinks and insulation abrasions.

2.8. Wire installation shall not be subject to accumulation of water, oil or other foreign
matter.

2.9. Instrument cables are to be free of Orange drain wires.
2.10. Cable to be laid out neatly and undue crossing of cables is to be avoided
(refer Appendix 3).

2.11. All wire shall be protected against any contact with any surface other than
that designed specifically to support or protect the wire.

2.12. Protective edging, Grommets and similar materials shall be applied wherever
any possibility exists for a wire to contact a sharp edge.

2.13. A drip loop shall be provided in each wire or cable where water could
otherwise run along the wire or cable to the point where it enters a box or enclosure.
2.14. Wire/cables forming part of the wiring system shall be bent in a manner that
will not cause damage or place undue stress on their sheathing or insulation.

2.14.1.1. Where manufacturer’s information on recommended bend radii is not
available, the following radii may be considered suitable

2.14.1.2. Unarmoured sheathed cables 6 times the cable diameter
2.14.1.3. Armoured sheathed cables 12 times the cable diameter
2.14.1.4. (Change of direction AS/NZS 3000 3.9.7.)
2.15. Wire jumpers on devices shall be run within the loom, so as to not be misplaced
on device replacement.

3. Cable Colors and type:
Where possible the DKI standards for cable colors are to be strictly followed

3.1. Power cables – 110v – 240v Orange
3.2. Instrument cables – 0v – 24v Black
3.3. IS cables - Blue
3.4. Flexible cables and cords shall be 0.6/1kV or 450/750V rated, heavy duty, with
multiple stranded tinned copper conductors of 1.5sqmm minimum cross section
and with a tinned copper braided screen.

3.5. Insulation materials may be either PVC, EPR or NBR
3.6. Screens shall be included in all Zone 1 cables , with the exception of short lengths
(not > 600mm) of instrument cables

3.7. Wire and cable type used shall be as stated on DKI drawings, alternatives shall be
submitted for DKI approved.

3.8. Cables used for the transmission of signals from temperature, pressure, speed,
flow, weight, level and similar signals , or any 4-20mA, 0-20mA, 24VDC or similar
extra low voltage signal shall comprise twisted screened pairs.

3.9. Wire and cable sizes to be as stated or agreed by DKI cable block diagram and
cable schedule, alternatives shall be submitted for DKI approved.
4. Wire Colors inside of Exe, Exd boxes and junction boxes shall be:
240v Active
• Red

• White
• Brown
240v Neutral
• Black

• Light Blue
240v Earth
• Yellow / green

All earth bonding
• Yellow / green

+24vdc
• Grey

24 OV
• Brown

+12vdc
• Orange

12 OV
• Blue

4.1. In extreme cases where use of different cores color is unavoidable, then
heatshrink sleeving applied to the cores is required.

5. Wire segregation:-
5.1. Segregation of wiring with differing voltage rated Insulation i.e. Dekoron 110vac
and Power/control 0.6/1kv is a mandatory requirement..

5.2. The minimum separation distance between such cables or their related equipment
shall not be less than the distances given in the following table:

Circuit rating (kVA) Unshielded power cables (mm) Shielded
power cables
(mm)
<1 300 25
>1 <2 450 50
>2 <5 600 150
>5 1500 300
Separation between Power and Signal/Data Cables

5.3. Intrinsically Safe cables may only run together with non I.S. cables provided that
either the Intrinsically Safe cables or the non-I.S. cables are armoured.

5.4. Where a non-armoured intrinsically safe cable is installed with non armoured
power and control cables, a segregation distance of 50mm minimum must be
strictly observed throughout the complete cable run, and within any switchboard,
junction box and the like.