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 and in ducting, if in insulated walls you will need to reduce further.  The amount in brackets is the absolute max and must never be exceeded. The 6mm 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

6mm²

70A

 

3.39

10mm²

98A

 

1.95

16mm²

94A (115Max)

80A (91Max)

2.9

35mm²

150A (188Max)

115A (139Max)

1.35

50mm²

190A (228Max)

140A (164Max)

0.98

70mm²

260A (291Max)

180A (203Max)

0.67

95mm²

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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35mm cable end lug, 6mm hole, heavy duty copper tube terminal
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price:
£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:
£0.49 +vat
£0.59
STAUBLI Professional Tool case MC4 and MC4-Evo 2 - 32.6126
Availability: In Stock - Delivery 2-5 days or collect from Lewes
Price:
£457.50 +vat
£549
STAUBLI Professional Installer Tool Belt Set - 32.0387
Availability: In Stock - Delivery 2-5 days or collect from Lewes
Price:
£49.17 +vat
£59
50mm cable - Per Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price:
£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:
£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:
£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:
£0.59 +vat
£0.70
BYD LVS cable connections 50mm2
Availability: Delivery Only - Usually 1 - 3 days
Price:
£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:
£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:
£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:
£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:
£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:
£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:
£8.33 +vat
£10
70mm cable - Per Meter
Availability: In Stock - Delivery 1-3 days or collect from near Lewes
Price:
£16.67 +vat
£20