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Peter J Stewart-Hay


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Peter J Stewart-Hay


About Me

Personal Information

About me
A university trained Professional Mechanical Engineer, registered in the Province of Ontario, Canada.

A wire and cable manufacturing engineering specialist with over 35 years hands on experience.

Company Information

Stewart-Hay Associates
Unit 51, 1814 Shore Road
London, Ontario Canada
N6K 0C6
City / Town
Land phone
519 6413212


College / University
U of M
Graduation Year
B Sc. M.E.
Skills and Expertise
A university trained Professional Mechanical Engineer, registered in the Province of Ontario, Canada.

A wire and cable manufacturing engineering specialist with over 35 years hands on experience.

Recent activities

  • kunena.thankyou 2 hours ago
  • Peter J Stewart-Hay replied to the topic 'Problem With NIEHOFF Annealer R501' in the forum.
    Hello there Mr. Babak Amoun,

    I am always amazed that these emergency calls for help often seem to occur on a Sunday afternoon when everybody is closed.

    I would think that the fastest way to solve this apparent electronic problem would be to call Niehoff in Germany and talk with them.

    I assume you are in the Near East area (Pakistan, Bangladesh, India, Middle-east) and that you are drawing copper. When you talk with Niehoff be sure to give them all your information.

    The R501 is a good annealer and often it is tandemized with a rod breakdown drawing machine.

    Go to:
    Select your country or talk with Mr. Ralf Johne directly.

    Mr. Johne' s contact information is:

    Phone: +49 9122 977 283
    E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
    Read More... 4 days ago
  • kunena.thankyou 31 days ago
  • Peter J Stewart-Hay replied to the topic 'enamelling oven parameters' in the forum.
    Hello again,

    I think you should discuss this with the oven manufacturer as it would seem that if there is one wire remaining in the oven, you have too much heat energy going into the remaining wire in a short period of time.
    Read More... 32 days ago
  • Peter J Stewart-Hay replied to the topic 'Oil Resistant Test for PVC cables' in the forum.
    Dear Mr. Bogahawatte,

    Your question cannot be answered because:

    A) We have no idea of what and where your country is.
    B) We have no idea of what country and where your customers of oil resistant cables are, plus what oils and solvents they need your cables to be resistant to.
    C) You will then have to find out what specification your customers want your cables tested to. Then go buy the test equipment and start testing.
    Read More... 43 days ago
  • Peter J Stewart-Hay replied to the topic 'Cable splitter in my Appartment' in the forum.
    Hello there Mr. Yahya arr;

    The items that you call "cylindrical things" are frequency filters, designed to let the cable channels that one is paying for pass through while the other channels are blocked. The reason you are having difficulty removing a cable filter is that the cable company does not want people cheating by removing them and thus getting all the channels, most of them, for free. It requires a special tool, owned by the cable company, to remove a filter.

    If you are certain that your T V set is ok and that the cable filter has failed, the cable company then must replace it as it is part of their system.

    Quit playing around with your splitter and go after the cable company again.
    Read More... 46 days ago
  • Hello Mr. Tobias D.

    First of all, please be aware that the electricity does not jump between the individual wires in the strand. The electricity instead runs along each individual wire in the helix.
    Secondly and as far as North America (USA and Canada) is concerned, the conductivity of the copper is determined by the hardness of the copper and the amount of trace metals in the copper. For example, Nexans Canada used to have a trace amount of silver in the copper and thus the conductivity was a little bit better than 100%.
    Thirdly the conductivity is determined by the conductivity as well as the dimensions.

    If you are terminating by clamping a copper conductor dirty surface to a tinned copper bar there could be differences in the electrical resistivity. Likewise, there are two different methods for coating a tinned copper bar. The best method is by electro-plating. The poorer method is by hot dipped tin. There are other factors such as the compression of the conductor on the tinned copper bar.

    Finally, PVC is a mixture of chemicals and fillers and is often mixed and pelletized at each wire and cable company. The PVC formulations are generally the Intellectual property of the wire and cable company and thus not readily available.

    I strongly recommend that you eliminate all the other conductivity issues before attempting to go after the wire and cable companies.
    Read More... 58 days ago
  • Mr Mohsen Ajalloueian thanks user 'Peter J Stewart-Hay' in the forum message ' Enamelling dies'.
    kunena.thankyou 64 days ago