All power and signal circuits entering the MRI room are equipped with RF filters to prevent unwanted RF from being conducted into the enclosure. Filters are usually fitted in both phase and neutral power lines. To ensure patient safety, only approved types are used having a maximum leakage of 2 x 0.6 ma and conforming to the ENEC IEC / EN 60939 and UL 1283 standards. Electrical filters are available from GPE with a rated current up to 50 A. Other filters for signal and control circuits are also available.