Wirebridge fusehead

Figure 10.1 Wirebridge fusehead (bottom), quickmatch (middle) and piped match (top).

When fired electrically, fireworks are connected to wirebridge fuseheads. The fuseheads can inadvertently ignite if subjected to radio hazard (RAD HAZ) when in the vicinity of radio frequency sources such as cellular (mobile) telephones or walkie-talkie radios. Further advice on this should be sought from the makers of the wirebridge fuseheads and of the communication equipment because the characteristics of all these items can vary to some extent. 

RAD HAz OR RE HAz Radio Hazard. The hazard associated with the use of electro-explosive devices (EEDs) such as wirebridge fuseheads in the vicinity of radio-frequency transmitting equipment (BS 6657 Prevention of Inadvertent Initiation of Electro-explosive Devices by Radio-frequency Radiation). 

SERIES CIRCUIT A method of bring hreworks electrically by connecting wirebridge fusehead igniters in series, i.e. one after the other, so that the current hows through each in turn. 

WIREBRIDGE FUSEHEAD An electric igniter containing a bridgewire surrounded by a small bead of explosive composition designed to emit a short burst of gas and flame. 

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