Cable & Lugs

DC Cable Sizing Tool

This online cable size calculator tool makes it easy to establish the correct size of cables for any DC power system. 

DC Wire Sizing Calculator - Round your results up to the next cable size

Cable sizes: Free Air cables can carry the following Amps (cables in conduit or insulated walls will reduce the Amps you can put through the cable).  The table below shows our recommended max amps to put though the DC solar and battery cable sizes we supply in Free Air and In Ducts, if in insulated walls you will need to reduce further.  The amount in brackets is the absolute max and must never be exceeded. The 6 and 10mm refer to solar cable. The remaining sizes refer to battery cable.

Cable Size

Max Amps in Free Air

In Duct

Volt Drop 

Ohms/KM

6mm

70A

 

3.39

10mm

98A

 

1.95

16mm

94A (115Max)

80A (91Max)

2.9

35mm

150A (188Max)

115A (139Max)

1.35

50mm

190A (228Max)

140A (164Max)

0.98

70mm

260A (291Max)

180A (203Max)

0.67

95mm

325A (354Max)

200A (239Max)

0.49

The information contained within this table is for guidance only and is subject to change without notice or liability. All the information is provided in good faith and is
believed to be correct at the time of publication. When selecting cable accessories, please note that actual cable dimensions may vary due to manufacturing tolerances.

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10 Meters White 3 Core 1.5mm² Flexible Cable
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£17.09 +vat
£20
Lighting Cable - 5 Meter - 2 core for LED lights
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£5.13 +vat
£6
Premade MC4 6mm Solar Cable 1 meter - (Useful when panels or branch connectors do not reach) 1M length
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£6.41 +vat
£7.50
Premade MC4 6mm Solar Cable 50cm - (Useful when panels or branch connectors do not reach) 50cm length
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£4.27 +vat
£5
2.5mm, 3 core H07RN Flexible copper core, Rubber sheath cable 230VAC
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£1.71 +vat
£2
Premade MC4 6mm Solar Cable 2 meter - (Useful when panels or branch connectors do not reach) 2M length
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£8.55 +vat
£10
16A 15M Roller Mobile Mains Power Unit With LED Light
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£59.83 +vat
£70
Blue 4mm Tri-rated Cable 12VDC 41A
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£1.71 +vat
£2
Extension Lead 16A 230V 10m
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£17.09 +vat
£20
List Price:
£12.82 +vat
£15
Weather Resistant Rubber Flex Cable 0.75mm sq x 25m Drum
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£21.37 +vat
£25
6mm Solar Cable - per meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£1.50 +vat
£1.75
List Price:
£47.01 +vat
£55
6mm Solar Cable - 50 meter Reel/Drum
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£72.65 +vat
£85
Crimping tool for Battery terminal lugs 6mm² - 50mm² for crimping - Entry level crimping tool
Availability: Out Of Stock - Current ETA for new orders around 10 Feb
List Price:
£34.19 +vat
£40
6mm Solar Cable - 100 meter Reel/Drum
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£127.35 +vat
£149
230V 16A to 13A Fly Lead Converter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£12.82 +vat
£15
10mm Solar/Inverter/Charge controller Cable - per meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£2.56 +vat
£3
Extension Lead 16A 230V 14m
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
List Price:
£29.91
£21.37 +vat
£25
List Price:
£17.09 +vat
£20