Recent content by charzree

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    Cable Bending Radius

    A real dumb question; The cable manufacturer has shown 4D as minimum bending radius of the cable in the datasheet. With this information how can I verify my installation? That is whether I would need any support frame for my Junction box (a big box with bus bar in it) to increase the height of...
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    What are the items to be checked while reviewing the 3D model from Electrical perspective?

    What are the items to be checked while reviewing the 3D model from Electrical perspective?
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    Cable Lugs Question

    The project specification says, "All compression connectors for 10mm2 (8 AWG) and larger conductors shall have a manufacturer's reference compression die number and conductor size printed or stamped on the connector". Does Pin type lugs come with conductor size and die number stamped on the lugs?
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    Cable Glands - CMP Vs EATON

    EATON cable glands comes with many sealing ranges for the same gland size, Eaton gland selection chart (attached), Where as CMP glands comes with one sealing range for the same gland size, CMP gland selection chart attached. Why do EATON have many sealing ranges for the same gland size...
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    Transformer Neutral Grounding

    I'm asking this for my self improvement. I'm an Electrician who is trying to improve in his trade.
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    Bus duct - Earth cable Size

    Bus duct is used to transmit the power from the secondary of the transformer to the Main distribution board? If the cable is used instead of bus duct, we would size the ground cable approximately half the cross section area of the power cables according BS 7671 table. 54.7 If this is a bus...
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    Neutral - Earth link in Main Switchboard

    When is an earth neutral link required in an main switchboard? Is it particular to the earthing system? Is it common to earth the source neutral at the first point in the LV system where the neutral is terminated - the main LV switchboard. If the Neutral terminal of the transformer is...
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    Transformer Neutral Grounding

    Should the neutral of the transformer be provided with separate ground rod or can it be interconnected with earth bar which also connects the transformer frame and other equipment frame grounding. Is it correct as per the European standards? ( See the attachment)
  9. Tr neutral to Earth.PNG

    Tr neutral to Earth.PNG

    • charzree
    • Media item
    • Comments: 0
    • Category: Professional Electrician
  10. C

    Switch gear / Panel board Rating

    The Incoming breaker model is Terasaki - S250-PE, 250 Ampere Frame rated for which Ics is 70kA, Category A breaker The outgoing breakers model is Terasaki - H125 NJ, 125 Ampere Frame rated for which Ics is 85kA,Category A breakers The bus bar rating is 65kA for 1s. How should this panel board...
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    Three phase - serial connection

    I mean the three core (Multicore) Power cable running from the panel to the FCU 1 and then from Junction box / Switch Isolator, another cable will be connected to FCU2
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    Three phase - serial connection

    I have two FCU's in the same room. Can these two FCU's (3 phase) be fed from same cable from the panel located in the another room? Is it acceptable as per codes? or do I need to run separate cables?
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    Emergency Lighting - Understanding

    Kindly refer the attached Image. There are 2 Places at which I can give reference signals for Emergency lighting. 1. At MXC 2. At LTC (Unswitched & Switched) What is the difference between the above two? why there is a need to provide input at two different locations?
    • charzree
    • Thread
    • emergency emergency lighting lighting understanding
    • Replies: 1
    • Forum: Lighting Forum
  14. Emergency Lighting.PNG

    Emergency Lighting.PNG

    • charzree
    • Media item
    • Comments: 0
    • Category: Lighting and Light Fitting
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    LTC Addressable Interface Module to be connected to the ballasts

    What is unswitched live and switched live in the attached image?. It it the drawing of the addressable interface module (AIM) to be connected to the ballasts. To where should I connect these USL & SL terminals? What is the purpose of these terminals?

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