What is the meaning of this circuit symbol?

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The discussion centers on identifying a circuit symbol in a Cockcroft-Walton schematic, specifically a box with a zigzag line, which is believed to represent a fuse. Participants agree that the symbol likely indicates a fuse rated at 0.1 amp. There is also a query regarding the suitability of a circuit breaker or fuse rated for a 100mA cutoff for this application. Additionally, requests for basic equations related to the Cockcroft-Walton voltage multiplier are made, emphasizing the need for simple, single-variable calculus. The conversation highlights the importance of understanding circuit components and their specifications in practical applications.
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What is the meaning of the topleft most symbol in this Cockroft-Walton schematic?

http://www.instructables.com/files/deriv/F85/ISAS/FL77XCRN/F85ISASFL77XCRN.MEDIUM.jpg

It's the box with the zig zag line through it. I noticed that he is using boxes to denote resistors, but the zig zag line and current specification makes me think that it may be a fuse.

If such is the case, what is a suitable circuit breaker or fuse to use in this application? Will anything rated for a 100mA cutoff and wall AC be suitable?

If anyone would like to share some of the equations (aka charging time derivations, way to calculate max current intake, etc) for a Cockroft-Walton voltage multiplier, I would appreciate it. I am in high school, so please keep the calculus single-variable, if possible ;)

Thank you in advance for any responses.

And yes, berkeman, I am being supervised by an experienced adult :]
 
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I would say it is a fuse rated at .1 amp.
 
Averagesupernova said:
I would say it is a fuse rated at .1 amp.

Me too.
 

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