These documents include information on the type of the cable, cable length and detail alongside gable name, drawing name, Source and destination (from-to) and electrical drawing number. In some documents, the cable gland is required to be specified in this document.
Equipment list (Step2) IO List (Step3) Network List (Step4) provide all the required component 

CABLE NAME	CABLE FROM	CABLE TO	DESCRIPTION	Drawing Page Ref for Connection.Page/Grid	Length (m) / Quantity	2.5mm² 3 Core + E + N (Power Bus)	2.5mm² 3 Core + E (Motor Cable)	2.5mm² 2 Core + E (24VDC supply)	1.5mm² 4 Core (E/Stop + Control) Grey control, Numbered cores	1.5mm² 16 Core + E Grey control, Numbered cores	3C & E (2.5mm) with Plug Fitted Unscreened, 3m (DMS Power)	3C+SC & E (2.5mm) with Plug Fitted Screened, 3m (DMS to Motor)	V1-G-5M-PUR 5m 4 Core M12 to free end for PEs	V31-GM-5M-PUR 5m 4 Core M8 to free end for PEs	VAZ-2T1-FK-5M-PUR-V1-W ASi network splitter cable	Profibus Cable (Purple)	ASi Cable (Yellow)	ASi Cable AUX (Black)
-W_BTM003/BLG.BDT.23	BTM003	BLG.BDT.23	MCP TO Collector Belt	-550/13	43	X
-W_BTM003/BlG.BDT.23n	BTM003	BlG.BDT.23n	MCP TO Collector Belt	-551/13	33	X
-W_BTM003/BUS_3	BTM003	BUS_3	MCP bus to BTG.BDT.24	-053/32	28	X
-W_BTM003/BUS_2	BTM003	BUS_2	MCP bus to BTG.BDT.302B	-053/22	35	X
-W_BTM003/BT1.29A.RMCP – P	BTM003	BT1.29A.RMCP – P	MCP TO RMCP	-053/07	35	X
-W_BTM003/BT1.29B.RMCP – P	BTM003	BT1.29B.RMCP – P	MCP TO RMCP	-053/07	35	X
-W_BTM003/ICM ABD 1&2 – P	BTM003	ICM ABD 1&2 – P	MCP TO ABD (Power)	-053/42	35	X

Cable selection guide:

To calculate the Cable Sizing one needs to know the load parameter. The load parameters are:

Voltage (V): Specify the voltage 

Phase arrangement: 1 Phase AC, 3 Phase AC or DC.

Load (kW, kVA, A, hp): Specify the load in kW, kVA, A, or hp. At the end of the day we use Amps as the main parameter but quite easy to convert from power to Amps as long as we know the voltage and Power factor.

PF: Specify the load power factor (cos&Phi) when the load is specified in kW or hp.

Max. volt drop (%): The maximum allowable voltage drop at the load. mentioned in the equipment documents.

Distance (m): The cable length in meters from the source to the load. The return length is automatically included by the calculator.

Cable type: The number of cores in the cable. Ignore the earth conductor in three-phase cables.

Insulation type: The type of insulation. Typically “Thermoplastic (PVC), 75°C” or “Thermoset (XLPE), 90°C”. In special cases “Thermoset (XLPE), 110°C” is used. Note that there is no option for “Thermoplastic (PVC), 90°C” (V-90) cables in AS/NZS 3008. In this case, you can use “Thermoset (XLPE), 90°C” in the calculator. However, bear in mind that V-90 cables cannot be exposed to high mechanical stress at 90°C. Refer to AS 3008 for more details.

Live core type: Copper, Flexible copper or Aluminium.

Live core size: Mostly we are seeking for smallest cable that meets the three criteria for current rating, voltage drop, and fault current rating.

Earth core type: Only copper is currently supported. 

Earth core size: selecting Minimum Copper Earthing Conductor Size is preferable, although mostly the standard cable cover this part automatically.

The number of parallel cables (multi-core) or Active cables per phase (single-core): parallel cables is a series of cable that carries the shared load.

Typically only one cable per phase, for single- or multi-core cables. More than one cable may be selected for high load scenarios. 

Cable installation: How the cable will be installed. Consider the worse case section of the cable installation. It applies a cofactor to the calculation.

An online calculator

https://www.jcalc.net/cable-sizing-calculator-as3008

Guideline of wire current carrying capacity

In careful engineering the voltage drop, insulation temperature limit, thickness, thermal conductivity, and air convection and temperature should all be taken into account.

AWG gauge	Diameter Inches	Diameter mm	Ohms per 1000 ft	Ohms per km	Max amps chassis wiring	Max amps power transmission
OOOO	0.46	11.684	0.049	0.16072	380	302
OOO	0.4096	10.40384	0.0618	0.202704	328	239
OO	0.3648	9.26592	0.0779	0.255512	283	190
0	0.3249	8.25246	0.0983	0.322424	245	150
1	0.2893	7.34822	0.1239	0.406392	211	119
2	0.2576	6.54304	0.1563	0.512664	181	94
3	0.2294	5.82676	0.197	0.64616	158	75
4	0.2043	5.18922	0.2485	0.81508	135	60
5	0.1819	4.62026	0.3133	1.027624	118	47
6	0.162	4.1148	0.3951	1.295928	101	37
7	0.1443	3.66522	0.4982	1.634096	89	30
8	0.1285	3.2639	0.6282	2.060496	73	24
9	0.1144	2.90576	0.7921	2.598088	64	19
10	0.1019	2.58826	0.9989	3.276392	55	15
11	0.0907	2.30378	1.26	4.1328	47	12
12	0.0808	2.05232	1.588	5.20864	41	9.3
13	0.072	1.8288	2.003	6.56984	35	7.4
14	0.0641	1.62814	2.525	8.282	32	5.9
15	0.0571	1.45034	3.184	10.44352	28	4.7
16	0.0508	1.29032	4.016	13.17248	22	3.7
17	0.0453	1.15062	5.064	16.60992	19	2.9
18	0.0403	1.02362	6.385	20.9428	16	2.3
19	0.0359	0.91186	8.051	26.40728	14	1.8
20	0.032	0.8128	10.15	33.292	11	1.5
21	0.0285	0.7239	12.8	41.984	9	1.2
22	0.0254	0.64516	16.14	52.9392	7	0.92
23	0.0226	0.57404	20.36	66.7808	4.7	0.729
24	0.0201	0.51054	25.67	84.1976	3.5	0.577
25	0.0179	0.45466	32.37	106.1736	2.7	0.457
26	0.0159	0.40386	40.81	133.8568	2.2	0.361
27	0.0142	0.36068	51.47	168.8216	1.7	0.288
28	0.0126	0.32004	64.9	212.872	1.4	0.226
29	0.0113	0.28702	81.83	268.4024	1.2	0.182
30	0.01	0.254	103.2	338.496	0.86	0.142
31	0.0089	0.22606	130.1	426.728	0.7	0.113
32	0.008	0.2032	164.1	538.248	0.53	0.091
Metric 2.0	0.00787	0.200	169.39	555.61	0.51	0.088
33	0.0071	0.18034	206.9	678.632	0.43	0.072
Metric 1.8	0.00709	0.180	207.5	680.55	0.43	0.072
34	0.0063	0.16002	260.9	855.752	0.33	0.056
Metric 1.6	0.0063	0.16002	260.9	855.752	0.33	0.056
35	0.0056	0.14224	329	1079.12	0.27	0.044
Metric 1.4	.00551	.140	339	1114	0.26	0.043
36	0.005	0.127	414.8	1360	0.21	0.035
Metric 1.25	.00492	0.125	428.2	1404	0.20	0.034
37	0.0045	0.1143	523.1	1715	0.17	0.0289
Metric 1.12	.00441	0.112	533.8	1750	0.163	0.0277
38	0.004	0.1016	659.6	2163	0.13	0.0228
Metric 1	.00394	0.1000	670.2	2198	0.126	0.0225
39	0.0035	0.0889	831.8	2728	0.11	0.0175
40	0.0031	0.07874	1049	3440	0.09	0.0137

Wiring Color Codes

Wiring for AC and DC power distribution branch circuits are colour coded for the identification of individual wires. In some jurisdictions, all wire colours are specified in legal documents. In other jurisdictions, only a few conductor colours are so codified. In that case, local custom dictates the “optional” wire colours.

IEC, AC: Most of Europe abides by IEC (International Electrotechnical Commission) wiring colour codes for AC branch circuits. These are listed in the table below. The older colour codes in the table reflect the previous style which did not account for proper phase rotation. The protective ground wire (listed as green-yellow) is green with a yellow stripe.

Technical Cable Guide

Fiber Optic

Single-mode fibres are designed to carry one mode of light over long distances. They have a small core typically 9 microns that carries one ray of light at a time. This allows them to carry large amounts of data over very long distances up to 10 km.

Multi-mode (Cheaper Option) fibres are designed to carry multiple modes of light over short distances. They have a large core typically 50 or 62.5 microns that carries multiple rays of light at the same time. This allows them to carry large amounts of data over shorter distances up to 2 km.

Cable Parts

Cable or Wire?

What is the difference between a wire and cable? This is one of the most basic questions that still need to be answered. Wire is a single conductor and cable is a group of two or more insulated conductors. If there was not any insulation on the two conductors then it would not be a cable, it would still be a single conductor which would classify as a wire.

Ingredients!

The picture above shows structure of a sample wire, although all cables or wire may don’t have all part of mentioned parts.

Insulation: two kind of insulation are common in industries

1. PVC: Max. degree is 70 Celsius
2. XLPE: Max. degree is 90 Celsius

If cable uses in outdoor circumstance the cable has Amour,
If cable uses in oily circumstance the cable has jacket
If cable uses for transferring DC or HV the cable has copper shield

The picture above shows a complete cable and most of cables don’t have all parts shown in the picture.

The conductor can be a single solid wire or made up of a number of thin strands. Solid or single-stranded wire is not very flexible and is used where rigid connections are acceptable or preferred – usually in high current applications in power switching contractors.

Stranded wire is flexible and most interconnections between components are made with it.

Wire specifications

There are several ways to describe the wire type. The most used method is to specify the number of strands in the conductor, the diameter of the strands, the cross sectional area of the conductor then the insulation type.

Example: 35/0.25 PVC 0.28 mm2 è the conductor comprises 35 strands. Each strand is 0.25mm and insulated with PVC the conductor has a cross-sectional area nominally of 0.28mm2.

Solid wire can also be specified using the Standard Wire Gauge or SWG system.

British Standard Wire Gauge is a set of wire sizes is generally abbreviated to SWG. It is also known as: Imperial Wire Gauge or British Standard Gauge.

D(AWG)=.005·92^{((36-AWG)/39)} inch.

Note that in AWG the diameter goes up as the gauge goes down, but for metric gauges it is the opposite. Probably because of this confusion, most of the time metric sized wire is specified in millimeters rather than metric gauges.

The SWG number is equivalent to a specific diameter of conductor

SWG	in	mm
7/0	0.5	12.700
6/0	0.464	11.786
5/0	0.432	10.973
4/0	0.4	10.160
3/0	0.372	9.449
2/0	0.348	8.839
0	0.324	8.230
1	0.3	7.620
2	0.276	7.010
3	0.252	6.401
6	0.192	4.877
7	0.176	4.470
8	0.16	4.064
9	0.144	3.658
10	0.128	3.251
11	0.116	2.946
12	0.104	2.642
13	0.092	2.337
14	0.08	2.032
15	0.072	1.829
16	0.064	1.626
17	0.056	1.422
18	0.048	1.219
19	0.04	1.016
20	0.036	0.914
21	0.032	0.813
22	0.028	0.711
23	0.024	0.610
24	0.022	0.559
25	0.02	0.5080
26	0.018	0.4572
27	0.0164	0.4166
28	0.0148	0.3759
29	0.0136	0.3454
30	0.0124	0.3150
31	0.0116	0.2946
32	0.0108	0.2743
33	0.01	0.2540
34	0.0092	0.2337
35	0.0084	0.2134
36	0.0076	0.1930
37	0.0068	0.1727
38	0.006	0.1524
39	0.0052	0.1321
40	0.0048	0.1219
41	0.0044	0.1118
42	0.004	0.1016
43	0.0036	0.0914
44	0.0032	0.0813
45	0.0028	0.0711
46	0.0024	0.0610
47	0.002	0.0508
48	0.0016	0.0406
49	0.0012	0.0305
50	0.001	0.0254

Wires in the market

Standards wires produce in different companies. But all companies produce below sizes:

Diameter mm2: 0.5 – 0.75 – 1 – 1.5 – 2.5 – 4-6-10-16-25-35-50-70-95-120-150-185-240-300-400-500

Power Cable specifications

Low Voltage: Cables generally used for rated voltage less than 1 kV.

Medium Voltage: Cables generally used for rated voltage between1 kV and 36 kV.

High Voltage: Cables generally used for rated voltage bigger than 36 kV.

Common type for describing a cable is NxM+M0. M shows Number of main wire inside of cable, N shows diameter of main wires, M0 shows one more wire in the cable uses for Earth.

For example: 3*25+15 means the cable has 3 main wires, diameters of wires are 25mm2 and it has one 15mm2 wire for earth.

Examples:

NA2XS2Y 1×35 RM/16 6/10 KV

Single core XPLPE insulated cable with PE sheath, circular, stranded aluminum conductor with nominal cross section 35mm2 cover with cooper screen 16 mm2 and rating voltage (U0/U) 6/10 KV

U0 is cable nominal voltage between contactor and metal covering or earth

U is cable nominal voltage between phase contactors for 3 phase u=√3 u0