Providing and Installing Two Lightning Rods

• Country: Lebanon
• Summary: Providing and Installing Two Lightning Rods
• LBT Ref No: 54525194
• Deadline: 13 Sep 2021
• Financier: Self Financed
• Purchaser Ownership: Government
• Tender Value: Refer Document
• Notice Type: Tender
• Document Ref. No.:
• Purchaser's Detail:
  Login to see full purchaser details. Login to see full purchaser details. Login to see full purchaser details. Login to see full purchaser details. Login to see full purchaser details. Login to see full purchaser details. Login to see full purchaser details. Login to see full purchaser details. Login to see full purchaser details.

  Login to see details
• Description:
• Tenders are invited for Providing and Installing Two Lightning Rods for the Network of Surveillance Cameras Belonging to the Training Village at the Aramoun Institute 1-LIGHTNING The lightning rod to be installed must comply with the following conformities: It must guarantee level 1 protection within a radius of at least 75m. It must have an autonomous electric starting device or it must generate high voltage pulses when approaching the storm without any external or assisted power supply (electrical or mechanical) The geometry of the shank (tip) shall be stainless steel or chromed copper and comply with NFC 17-102. The lightning current path should be independent of the electron (ion) current emitting device. Lightning rods that use radioactive sources are prohibited. 2-EARTHING The earth connection must be trench or triangular shape with a depth equal to 50cm (minimum) below the level of the ground with installation of a manhole at the connection point of the downward cable with the earth socket. The earth connection will be consisting of copperweld type stakes with a steel core covered with a layer of copper, the minimum thickness of which is 0.25mm, the minimum stake length is 1.5m and its minimum diameter is 16mm. The earthing resistance must not exceed 5 ohms for measurement in dry periods (June, July, August and September). Possibility of using copper screens if necessary. The use of any chemical additive to lower the grounding resistance is prohibited. This earth must be installed at least 10 m from any other earth connection. The earth system must be fitted with a cut-off bar connecting it to the system Lightning rod, located 2m above the ground. 3- LIGHTNING TERMINAL INSTALLATION: The lightning rod must be installed at a height of six meters from the roof surface of the building to be protected and in any case its point must exceed by a minimum height of 2m any point or metal structure present on the building. The lightning rod must be fitted with a 6 m hot-dip galvanized pole (galvan = 1.5inches), fixed on a galvanized steel base. The mat must be securely held by means of at least 3 galvanized steel tensioners with a minimum diameter of 5mm. The descent of the lightning rod to the earth must be of good electrical and mechanical resistance, and it must be fixed at the rate of three fixings at least per linear meter. (The cable route must be as straight as possible and avoiding any sudden bends). The tenderer must use a descent using a flat copper cable of 25 × 3 mm² or 30 × 2mm² of dimensions. The drop cable must be at least 1m away from important internal conductive elements (such as central heating, electricity, water). Important exterior metal parts, located at least one meter from the descent, are electrically connected. The descent must be fitted with a galvanized steel protection tube, this tube must be installed between the cut-off bar and the ground and secured with 3 stainless steel clamps. [Disclaimer: The above text is machine translated. For accurate information kindly refer the original document.]
• Documents:

 Tender Notice