This standard applies to shunts for use in direct current circuits to extend the range of instruments or other measuring devices. This standard may apply with suitable exceptions to shunts constructed for special requirements: for example@ those having unusually high or low current ratings or voltage drops@ special or unusual ranges@ and nonstandard terminal arrangements for special applications. This standard dqes not apply to the following: (1) Shunts for special military applications (2) Internal shunts used as a part of a selfcontained ammeter (3) Shunts for use as standards or for high precision measurements (4) General purpose shunts of lower accuracy than specified@ to be used where required indications are only approximate