'''Head diameter for electrical loads'''
{| class="twocolortable" style="text-align: left; font-size: 12px;width:40%"
|-
|For AC currents:
|approx. 1 – 1.5 A/mm²
|-
|For 1 A
|min. 2 mm head diameter
|-
|10 A
|approx. 3 – 3.5 mm head diameter
|-
|20 A
|approx. 5 mm head diameter
|-
|For DC currents:
|approx. 0.5 – 0.8 A/mm²
|}
'''Head radius R for electrical loads'''
{| class="twocolortable" style="text-align: left; font-size: 12px;width:40%"
|-
|for I < 1 A
|R ≈ 1,5 mm
|-
|I = 6 A
|R ≈ 5 mm
|-
|I = 10 A
|R ≈ 10 mm
|-
|I = 20 A
|R ≈ 15 mm
|}
