_____
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jack Davis
Sent: Wednesday, March 17, 2010 1:15 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Copper pipe rather than 2/0 copper wire
<http://groups.yahoo.com/group/Repeater-Builder/message/98899;_ylc=X3oDMTJxM
XBnc3YwBF9TAzk3MzU5NzE1BGdycElkAzEwNDE2OARncnBzcElkAzE3MDUwNjMxMDgEbXNnSWQDO
Tg4OTkEc2VjA2Rtc2cEc2xrA3Ztc2cEc3RpbWUDMTI2ODgwMDcyMw--> Re: Copper pipe
rather than 2/0 copper wire
Posted by: "Eric Lemmon"
<mailto:wb6...@verizon.net?subject=%20re%3a%20copper%20pipe%20rather%20than%
202%2F0%20copper%20wire> wb6...@verizon.net
<http://profiles.yahoo.com/wb6fly> wb6fly
Tue Mar 16, 2010 5:55 pm (PDT)
Jesse,
Not a good idea. Both NFPA 70 (the National Electrical Code) and NFPA 780
(the Lightning Protection Code) have strict requirements for wire sizes and
connection methods. Neither grounding systems nor lightning protection
systems may use a soldered connection in the circuit. Perhaps your best
course of action is to understand the Code requirements, and construct your
system accordingly.
Keep in mind the fact that your insurance underwriter may deny any and all
claims for damages due to lightning, if your system was constructed in a
manner inconsistent with the applicable codes.
73, Eric Lemmon WB6FLY
You dont need any solder joints with type K or L soft copper. The material
comes is 60 or 100 foot rolls and you just flatten the ends and drill holes
for mounting bolts and star washers. ½ inch soft copper is actually 5/8
inch OD and makes a great conductor. The material comes in size up to 2
inch but that gets pretty expensive. This pipe is designed to be buried in
the ground so you can be assured it will stand up just fine outdoors. One
caution is to anchor it down, swinging in the wind will cause it to break
due to repeated flexing. All the normal bend radius for electrical
conductors should be observed as lightning does not like to make sharp
corners.
Jack
K6YC
5/8 OD gives you 1.96 inches (5/8 x 3.14) of surface area. 1 inch copper
strap gives 2 inches of surface area.
2 inch copper strap gives you 4 inches surface area. Copper strap should be
less expensive than copper tubing.__,_._,__
Why would you use copper tubing?
73
Gary K4FMX
