# GROUNDING OF A SOUND RECORDING COMPLEX

Like any other accurate and expensive electronics, the equipment of the recording complex requires a reliable grounding system. In addition, during recording, it is important to eliminate interference, and this requires a low resistance of the grounding device - 2 ohms. ZANDZ Technical Center received a request for the calculation of such grounding for one of the recording complexes. Let's study the solution offered by our specialists.

## Calculation example of grounding for a sound recording complex

Object: Sound Recording Complex

Figure 1 - Object placement.

Carry out a grounding device with the resistance not exceeding 2 ohms.

## Solution:

Measures to ensure the requirements for the grounding system of the recording complex:

1. Grounding is made in accordance with the EIC 7th ed.

2. Installation of 18 vertical electrodes 6 m long united by a horizontal electrode (copper-bonded tape 30x4 mm). The distance from the horizontal electrode to the object should be not less than 1 m, deepening 0.5 - 0.7 meters

Grounding device resistance calculation:

The design resistance of the grounding device is 1,97 Ohm.

Figure 2 shows the arrangement of equipment.

Table 1 provides a list of the necessary equipment and materials for grounding of the sound recording complex.

Figure 2 - Location of grounding equipment for a sound recording complex.

Электрод - electrode
Полоса омедненная – copper-bonded tape
Колодец инспекционный – inspection pit

Chart 1 - List of equipment and materials.

 № Figure Product item Name Quantity, pcs. 1. ZZ-001-065 ZANDZ Copper-bonded threaded grounding rod (D14; 1.5 m) 72 2. ZZ-002-061 ZANDZ Threaded coupler 55 3. ZZ-003-061 ZANDZ Starting tip 18 4. ZZ-004-060 ZANDZ Driving head for a jackhammer 16 5. ZZ-006-000 ZANDZ Conductive grease 4 6. ZZ-008-000 ZANDZ Header for a jackhammer (SDS max) 1 7. ZZ-005-064 ZANDZ Clamp for connecting conductor (up to 40 mm) 22 8. ZZ-007-030 ZANDZ Waterproof tape 6 9. GL-11075-50 GALMAR Copper-bonded tape (30 * 4 mm / S 120 mm²; coil of 50 meters) 4 10. GL-11404 GALMAR Inspection pit for all soil types 1