Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Replies 6 replies
  • Subscribers 33 subscribers
  • Views 951 views
  • Users 0 members are here
Options
You may also be interested in

1.2kohm from stop tap to met although fed by copper pipe and then plastic pipe.

hertzal123

As above a 1 meter section of plastic pipe joins onto the lead watermain under the floor,whilst the gas supply

pipe passes through a brick wall and awaits the gas meter to be fitted.My thoughts are that the gas pipe through

the wall is giving the low reading,but could the water in the plastic also be contributing since it connects to the lead?

Gas and water pipes are glanded into the boiler,which is not electrically connected atm.I have main bonded gas

and water,although in theory the water does not need bonding.Thanks for any advice.

                                                                                                    Regards,

                                                                                                           Hz

Parents
  • 0

    I assume this figure is pre the addition of any bonding in this house, but what about the neighbours - they may well have bonding from MET to water pipes. even if external gas is plastic. Actually 1k2 sounds very high for that, I;d hjave expected single figures to sub ohm.

    Water in 15mm or 22mm plastic pipes, unless undrinkably contaminated (and with the various treatments, pipes in heating systems can be) will be tens to hundreds of k ohms per metre of length, so there is at least one parallel path.

    M

Reply
  • 0

    I assume this figure is pre the addition of any bonding in this house, but what about the neighbours - they may well have bonding from MET to water pipes. even if external gas is plastic. Actually 1k2 sounds very high for that, I;d hjave expected single figures to sub ohm.

    Water in 15mm or 22mm plastic pipes, unless undrinkably contaminated (and with the various treatments, pipes in heating systems can be) will be tens to hundreds of k ohms per metre of length, so there is at least one parallel path.

    M

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines