The NFPA and IEEE recommend a ground resistance value of 5 ohms or less while the NEC has stated to “Make sure that system impedance to ground is less than 5 ohms specified in NEC 50. In facilities with sensitive equipment it should be 5ohms or less”.
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Stock Status Add To Cart MCB4-L2D-1P-D1 FMX Miniature Circuit Breaker, UL 489, 240 VAC / 60 VDC, 10 kA, 1-Pole, Box Lug Terminal, D Curve, 1A 1+ $28. 10 10+.
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List prices only, excl VAT. PRICING EFFECTIVE 1 OCTOBER Our products are available at authorised distributors & retailers countrywide.
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Typical cost range for a 240V two-pole breaker is $5-$120 depending on type and features. The total project cost often tracks with whether AFCI/GFCI protection is required by code in the area and whether the existing panel supports a modern replacement without modification.
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