Bl This standard establishes the general characteristics to which the connectors of electrical devices must respond, with the exception of the dimensions and normal values of the characteristic electrical magnitudes. B-2 This standard does not include accessories intended for use in environments. explosives or corrosive gases, nor in on-board installations. B-3 This standard also does not include bipolar connectors for electric heating appliances, which are the subject of the IRAM 2064 standard.