Attachment 3 - Equipment Grounding Test Results Report- EES.pdf

520 Prairie Industrial PKWY, Mulberry, FL. 33860 – 863-425-2698 – WWW.EESLLCFL.COM

“Electrical Failure Is Not An Option”

EXECUTIVE SUMMARY

June 15, 2023

Golden Wolf - Contractor P:

4301 Rickenbacker Causeway F:

Miami, FL. 33149 C: 443-624-3138 E: jmartinez@goldenwolf.com

ATTENTION: Julie Martinez

SUBJECT: Equipment Grounding Continuity Test and Earth Grounding Resistance Test Results

LOCATION NOAA Miami

Dear Julie:

Thank you for your confidence you have placed in Engineered Electric Services, EES, by authorizing us to conduct the above referenced services.

This report includes the following sections:

1. This Executive Summary

2. Earth Ground Resistance Test Result

3. Equipment Continuity Test Results

4. Courtesy copy of Partial Existing Grounding System

Previously

Electric East, LLC

520 Prairie Industrial PKWY, Mulberry, FL. 33860 – 863-425-2698 – WWW.EESLLCFL.COM

Findings and Recommendations

Earth Ground Resistance Test

The Fall of Potential Method using a AMECO MODEL 4620

National Electric Code, NEC, 2017, which was adopted by the State of Florida in January 2021, NEC 250.53(2) indicates a minimum of 25 ohms earth ground resistance. In the State of Florida, it is generally recommended the earth ground resistance be 5 ohms or less, due to lightning frequency.

The test results are summarized below:

Fall of Potential Method 1.24 ohms

This result is withing acceptable ranges.

Note, that a Clamp on Ground Meter was attempted but results were sporadic and without knowledge of the external grounding configuration, results were discarded. Also the ground floor ground rod had several ground wires terminated on it, and it was not possible to use the clamp on ground meter without chipping away concrete around the ground rod.

Equipment Continuity Test

A Simpson 260 was used along with a 500 foot test spool of #10 wire to measure between the components to determine the continuity resistance. The measured resistance, subtracted the test spool lead resistance, resulted in the actual component continuity resistance. This result should be less than

1.0 ohms.

As can be seen, all test results are satisfactory.

1. Recommend adding another ground bar in the ground floor and re-terminate the branch grounds from the ground rods.

2. Connect the ground bar to other equipment in Room 223. A ground wire was cut off above the ceiling in Room 243, that may be the wire that was to go to Room 223.

Thank you for the privilege of serving you! If there are any questions, please contact me.

Sincerely, John Leedy, P.E.

Electrical Engineer

FL:PE45924, GA: PE38442, TX: PE121344

Owner Engineered Electric Services, LLC

NOAA - MIAMI 1

Faciltiy to the West Job Number: 50950 Date: 06/09/23

Distance Ohms Delta Effective Resistance is 45 1.16 0.03

1.24 Ohms 90 1.19 0.01

135 1.20 0.01 180 1.21 0.02 225 1.23 0.01 270 1.24 0.00 315 1.24 0.02 360 1.26 0.12 405 1.38 0.04 450 1.42 0.05 495 1.47 0.04 540 1.51 0.04 585 1.55 0.05 630 1.60 0.08 675 1.68 0.08 720 1.76 0.11 765 1.87 0.09 810 1.96 0.31 855 2.27

1.24 OHMS

0.00

0.50

1.00

1.50

2.00

2.50

45 90 135 180 225 270 315 360 405 450 495 540 585 630 675 720 765 810 855

R es is ta nc e

Distance

Faciltiy to the West

Ohms

Y:\GoldenWolf\#50950-GoldenWolf - NOAA AF Risk Assessment\Ground Reports Field Data\EES -Earth Ground Megger Report.xls1 (1)

FROM TO

# COMPONENT COMPONENT TEST

OHMS (X)

LESS TOTAL

TEST LEAD

WIRE

RESISTANCE

(Y)

LOCATION

GROUND

RESISTANCE-

(X-Y) NOTES

1 B GROUND ROD #1 B GROUND BAR #2 4.9 4.8 0.1

2 B GROUND ROD #1 PANEL MD 5.5 4.8 0.7

3 XFMR G PANEL G 5.7 4.8 0.9

4 B GROUND ROD B GROUND BAR 0.1 ― 0.1

5 TOOL SHOP GBAR PANEL GLC2 0.1 ― 0.1

6 XFMR GLC1 PANEL GLC1 0.1 ― 0.1

7 TOOL SHOP G BAR PUMP RM GBAR 5 4.8 0.2

8 TOOL SHOP G BAR PANEL HA 0.1 ― 0.1

9 TOOL SHOP G BAR PANEL OHLA 0.2 ― 0.2

10 XFMR LA PANEL LA 0.2 ― 0.2

11 TOOL SHOP G BAR PANEL OCED 5 4.8 0.2

12 TOOL SHOP G BAR PANEL PHOD 5 4.9 0.1

13 TOOL SHOP G BAR PANEL B SHOP 5 4.9 0.1

14 1ST ELEC GBAR #2 PANEL LID 0.2 ― 0.2

15 1ST ELEC GBAR #1 PANEL ELIA 0.2 ― 0.2

16 1ST ELEC GBAR #1 PANEL ELIB 0.2 ― 0.2

17 1ST ELEC GBAR #1 PANEL MSB 0.2 ― 0.2

18 1ST ELEC GBAR #1 PANEL IHA 5 4.8 0.2

19 1ST ELEC GBAR #1 PANEL IHAM 4.9 4.8 0.1

20 1ST ELEC GBAR #1 PANEL OLH 4.9 4.8 0.1

21 1ST ELEC GBAR #1 PANEL ILA SECT #1 4.9 4.8 0.1

22 1ST ELEC GBAR #1 PANEL ILA SECT #2 4.9 4.8 0.1

23 1ST ELEC GBAR #1 1ST ELEC GBAR #2 4.9 4.8 0.1

24 B GROUND ROD #1 1ST ELEC GBAR #1 5.4 4.8 0.6

25 1ST ELEC GBAR #2 1ST MECH GBAR 5 4.8 0.2

26 1ST ELEC GBAR #2 XFMR ILC 5 4.8 0.2

27 1ST MECH GBAR PANEL IHB 0.6 ― 0.6

28 XFMR T2 PANEL IHB SECT #1 4.9 4.8 0.1

29 XFMR T2 PANEL IHB SECT #2 4.9 4.8 0.1

30 XFMR T2 PANEL IHB SECT #3 4.9 4.8 0.1

31 XFMR 1LC2 PANEL ILC SECT #1 4.9 4.8 0.1

32 XFMR 1LC2 PANEL ILC SECT #2 4.9 4.8 0.1

33 XFMR 1LC2 PANEL ILC2 0.1 ― 0.1

34 XFMR 1LC2 PANEL IHC 0.1 ― 0.1

35 1ST MECH GBAR TOOL SHOP GBAR 5 4.8 0.2

36 1ST MECH GBAR TELEPHONE RM GBAR #1 4.9 4.8 0.1

37 1ST ELEC RM GBAR #1 2ND ELEC RM 243 GBAR 4.9 4.8 0.1

38 2ND ELEC RM 243 GBAR 2ND ELEC RM 232 GBAR 5.1 4.8 0.3

39 2ND ELEC RM 232 GBAR PANEL 2HB 0.7 ― 0.7

40 XFMR LB PANEL 2LB SECT #1 0.3 ― 0.3

41 XFMR LB PANEL 2LB SECT #2 0.3 ― 0.3

# COMPONENT COMPONENT TEST

OHMS (X)

LESS TOTAL

TEST LEAD

WIRE

RESISTANCE

(Y)

LOCATION

GROUND

RESISTANCE-

(X-Y) NOTES

42 XFMR LB PANEL 2LB SECT #3 0.3 ― 0.3

43 2ND ELEC RM 243 GBAR PANEL 2LA SECT #2 0.1 ― 0.1

44 2ND ELEC RM 243 GBAR PANEL 2LA SECT #1 0.1 ― 0.1

45 2ND ELEC RM 243 GBAR PANEL 2HA 0.1 ― 0.1

46 2ND ELEC RM 243 GBAR PANEL 2LA 0.1 ― 0.1

47 2ND ELEC RM 243 GBAR PANEL 2LF 0.1 ― 0.1

48 2ND ELEC RM 243 GBAR 2ND ELEC RM 223 GBAR 4.9 4.8 0.1

49 XFMR 2LC PANEL 2LC 0.1 ― 0.1

50 2ND ELEC RM 243 GBAR PANEL 2HC 4.9 4.8 0.1

51 3RD ELEC RM 340 GBAR PANEL 3LA SECT 1 0.1 ― 0.1

52 3RD ELEC RM 340 GBAR PANEL 3LA SECT 2 0.1 ― 0.1

53 3RD ELEC RM 340 GBAR PANEL 3HA 0.1 ― 0.1

54 3RD ELEC RM 340 GBAR PANEL 3LD SECT 1 0.1 ― 0.1

55 3RD ELEC RM 340 GBAR PANEL 3LD SECT 2 0.1 ― 0.1

56 3RD ELEC RM 340 GBAR XFMR #7 5 4.8 0.2

57 3RD ELEC RM 340 GBAR PANEL UF1 5 4.8 0.2

58 3RD ELEC RM 340 GBAR PANEL UF2 5 4.8 0.2

59 3RD ELEC RM 340 GBAR PANEL 3LB SECT 3 5 4.8 0.2

60 3RD ELEC RM 340 GBAR PANEL 3LB 5 4.8 0.2

61 3RD ELEC RM 340 GBAR PANEL 3LC 5 4.9 0.1

62 B GROUND ROD 4TH ELEC RM 413 GBAR 5.1 4.8 0.3

63 B GROUND ROD 5th ELEC RM 406 GBAR 5.1 4.8 0.3

64 B GROUND ROD 3RD DATA C RM 329 5.5 4.8 0.7

65 B GROUND ROD PANEL 3HA1 5.1 4.8 0.3

66 B GROUND ROD PANEL BP 5.2 4.8 0.4

67 4TH ?? ELEC RM 413 GBAR PANEL 4LB1 4.9 4.8 0.1

68 4TH ?? ELEC RM 413 GBAR PANEL 4LB2 4.9 4.8 0.1

69 4TH ?? ELEC RM 413 GBAR PANEL 5L 4.9 4.8 0.1

70 4TH ?? ELEC RM 413 GBAR PANEL 5H 4.9 4.8 0.1

71 2ND ELEC RM 243 GBAR PANEL 2LD 4.9 4.8 0.1

72 4TH ELEC RM 413 GBAR PANEL 4LC 0.1 ― 0.1

73 4TH ELEC RM 413 GBAR PANEL 4LA 0.1 ― 0.1

74 4TH CHILL RM 407 GBAR PANEL 4EID 0.1 ― 0.1

75 4TH CHILL RM 407 GBAR PANEL EL4 0.1 ― 0.1

76 4TH CHILL RM 407 GBAR PANEL M 4.9 4.8 0.1

77 4TH UPS RM 406 GBAR PANEL DPAC 0.1 ― 0.1

78 B GROUND ROD #1 PANEL WH #1 5 4.8 0.2

79 B GROUND ROD #1 PANEL WH #2 5 4.8 0.2

B GROUND ROD #1 PANEL HW

5.7 4.8 0.9

― INDICATES NO TEST LEAD NEEDED