Cable, Lugs & Crimping Tools

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. If installing in insulated walls or ducting you will need to reduce the current carrying capacity accordingly. Consult with a qualified electrican if you are unsure of how to do this.   The 6mm and 10mm refer to solar cable. The remaining sizes refer to battery/welding cable. You can download the datasheet for the cable here.

Cable Size

Max Amps in Free Air

6mm²

70A

10mm²

98A

16mm²

135A rated for 5mins @ 100% Duty

25mm²

180A rated for 5mins @ 100% Duty

35mm²

225A rated for 5mins @ 100% Duty

50mm²

285A rated for 5mins @ 100% Duty

70mm²

355A rated for 5mins @ 100% Duty

95mm²

430A rated for 5mins @ 100% Duty

120mm²

500A rated for 5mins @ 100% Duty cycle, 850Amps at 35% duty cycle

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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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
Price from:
£4.17 +vat
£5
Lighting Cable - 5 Meter - 2 core for LED lights
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£8.33 +vat
£10
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
Price from:
£6.25 +vat
£7.50
Premade MC4 6mm Solar Cable 3 meter - (Useful when panels or branch connectors do not reach) 3M length
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£10.42 +vat
£12.50
1.5mm² White 3 Core Flexible AC Cable 230VAC - 10 Meter Reel/Drum
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£16.67 +vat
£20
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
Price from:
£9.58 +vat
£11.50
2.5mm² 3 Core Flexible AC cable Rubber sheath, copper core 230VAC - per meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£3.33 +vat
£4
16A Hookup 10A 15M Roller Mobile Mains Power Unit With LED Light
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£58.33 +vat
£70
4mm² Blue sheath Tri-rated Cable 12VDC 41A - per meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£1.67 +vat
£2
Extension Lead 16A 230V 10m
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£16.67 +vat
£20
Price from:
£12.50 +vat
£15
Victron Shore Power Cable 16A 230V 15m
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£150.00 +vat
£180
Victron Shore Power Plug 16A
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£67.00 +vat
£80.40
Weather Resistant Rubber Flex Cable 0.75mm sq x 25m Drum
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£20.83 +vat
£25
6mm Solar Cable - per meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£1.67 +vat
£2
Crimping tool for Battery terminal lugs 6mm² - 50mm² for crimping - Entry level crimping tool
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£33.33 +vat
£40
Titan 1800W Electric heat gun 240V
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£20.83 +vat
£25
6mm Solar Cable - 50 Meter Reel/Drum
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£57.50 +vat
£69
6mm Solar Cable - 100 Meter Reel/Drum
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£112.50 +vat
£135
230V 16A to 13A Fly Lead Converter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Only 3 Left in stock
Price from:
£12.50
£8.00 +vat
£9.60