A list of ISO 11452-4 Testing Labs. ISO 11452-4 is an International EMC Standard from International Organization for Standardization. It is for Road vehicles - Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy - Part 4: Bulk current injection (BCI). EMC Directory is the largest directory of EMC Testing Companies on Internet. We have listed the leading EMC Testing companies from around the world and made them searchable by their location and capabilities.