Look up the maximum Zs earth fault loop impedance values for circuit breakers, MCB's, MCCB's and fuses
- Rewire-able fuse wire (semi-enclosed fuses)
- HBC Fuses
- HRC BS 88 Fuses
- 100% and 80% temperature adjusted values
- Includes disconnection times for 0.2s, 0.4s and 5 seconds
- Various manufacturer specific MCCB Zs charts
- RCD's in TT earthing systems max Zs calculator
- REC (DNO) maximum Ze values
- Uo of 55v and Uo of 63.5v max Zs values
- BS 7671 Amendment 3 2015 Zs values
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