Chapter Action levels – non-thermal effects

England, Wales and Scotland

Table AL1 – ALs for exposure to electromagnetic fields from 1 Hz to 10 MHz

Frequency range	External electric field strength Low ALs (E) [Vm^-1]	External electric field strength High ALs (E) [Vm^-1]
1 ≤ f < 25 Hz	2.0 × 10⁴	2.0 × 10⁴
25 ≤ f < 50 Hz	5.0 × 10⁵/f	2.0 × 10⁴
50 Hz ≤ f < 1.64 kHz	5.0 × 10⁵/f	1.0 × 10⁶/f
1.64 ≤ f < 3 kHz	5.0 × 10⁵/f	6.1 × 10²
3 kHz ≤ f ≤ 10 MHz	1.7 × 10²	6.1 × 10²
Exposure levels not exceeding the ALs will be compliant with:	Tables ELV2 and ELV3

Notes on Part 2