No concern | Slight concern | Severe concern | Extreme concern | |
---|---|---|---|---|
Electric Fields | ||||
With grounding cable (V/m) | < 1 | 1–5 | 5–50 | > 50 |
Potential-free (V/m) | < 0.3 | 0.3–1.5 | 1.5–10 | > 10 |
Magnetic Fields (nT) | < 20 | 20–100 | 100–500 | > 500 |
High frequency (μW/m2) | < 0.1 | 0.1–10 | 10–1000 | > 1000 |