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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35mm cable end lug, 10mm hole, heavy duty copper tube terminal
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£0.49 +vat
£0.59
35mm cable end lug, 6mm hole, heavy duty copper tube terminal
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£0.49 +vat
£0.59
35mm cable end lug, 8mm hole, heavy duty copper tube terminal
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£0.49 +vat
£0.59
50mm cable - Per Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£12.50 +vat
£15
50mm cable end lug, 10mm hole, heavy duty copper tube terminal
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£0.59 +vat
£0.70
50mm cable end lug, 6mm hole, heavy duty copper tube terminal
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£0.59 +vat
£0.70
50mm cable end lug, 8mm hole, heavy duty copper tube terminal
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£0.59 +vat
£0.70
BYD LVS cable connections 50mm2
Availability: Delivery Only - Usually 1 - 3 days
Price from:
£29.17 +vat
£35
6mm Cable - M10 Lug to Bare Wire - 1 Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£4.17 +vat
£5
6mm Cable - M6 Lug to Bare Wire - 1 Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£4.17 +vat
£5
6mm Cable - M8 Lug to Bare Wire - 1 Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£4.17 +vat
£5
6mm Cable - M10 Lug to Bare Wire - 2 Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£4.58 +vat
£5.50
6mm Cable - M8 Lug to Bare Wire - 2 Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£4.17 +vat
£5
6mm Cable - M8 Lug to Bare Wire - 5 Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£8.33 +vat
£10
70mm cable - Per Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price from:
£16.67 +vat
£20