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A little battery charger might include a MOV of only 1 watt, whereas a surge strip will have a 20 watt MOV or several of them in parallel. A house protector will have a large block-type MOV. Some manufacturers commonly design higher joule-rated surge protectors by connecting multiple MOVs in parallel and this can produce a misleading rating.
A North American power strip with two USB power ports that includes a built in surge protector. A power strip (also known as a multi-socket, power board and many other variations [a]) is a block of electrical sockets that attaches to the end of a flexible cable (typically with a mains plug on the other end), allowing multiple electrical devices to be powered from a single electrical socket.
Such protectors will survive about 10 average 20,000 amp lightning strikes, 400 surges of 2000 amps, or the one typically extreme surge. Protectors start at 1000 joules to survive multiple lightning surges or survive the extreme surge. A 200 or 400 joules protector is too small to protect from one average lightning surge. The www.tripplite.com ...
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'Plug in tons of items in one spot' — our tech writer's favorite surge protector is on sale for just $10 (50% off) at Amazon Ellie Conley Updated April 26, 2024 at 9:39 AM
IOW minimum size for a residential 'whole house' protector is typically more than 1000 joules. For plug-in protectors where all MOVs are not used during a surge, the same minimum number may be 3000 joules; not including MOVs (joules) installed for other ports such as phone or cable. If properly sized (sufficient joules), then a protector shunts ...
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