slightly higher than the cables they connect. California 50 A Connector In North America for moderate current requirements the 50 A California-style connector, also known as CS6364 and CS6365 is commonly used. It features a twist-lock design with a metal sleeve full protecting the blades on the male connector and a center ground spike on the female connector to aid in centering. California connectors are commonly used at outdoor events, shows and conventions and at construction sites. The connector gets its name from being developed as a safer connector during the early days of Hollywood film studios in California. The first high-current connectors used in the studios were stage pin (also referred to as "paddle plugs") used in theaters, which were not grounded. The California plug, however, is grounded by the outer steel shroud. This also helped protect the male contact pins from damage from the constant dragging of cables around a set throughout the day. The grounded shroud helps absorb the arc-flash if the connector is plugged or unplugged while energized. The original paddle plugs were known for dangerous arc-flashes, especially in the older DC-powered theaters in the early years of electrical stage lighting. For example, a three phase plug which requires a neutral connection cannot be inserted into a socket outlet which does not provide for such a connection. However, a plug which does not require a neutral connection can be inserted into a socket outlet which provides such a connection, although the neutral connection would not be utilized in that situation. For stage lighting use, a common plug is the 32-A 5-pin connector with a neutral pin. Motor loads that don't need the neutral use a four-pin connector. Larger requirements may use powerlock or camlock connectors. In the IT industry, the IEC 60309 system is sometimes used. Australia In Australia, New Zealand and many associated South Pacific island nations, the AS/NZS 3123 standard is used. In this series, multiple sizes of three-phase round-pin socket are standardized by current rating and neutral circuit. Each socket within a group accepts plugs in the same group up to its rating, but excludes plugs with a higher current rating, from a different group, or with a neutral pin (if there is not one in the socket). Multiphase plugs and sockets are rated at up to 500 V and all include an earth connection. These plugs and sockets are usually IP56 rated