Market-PECO-fault-duty-letters-dc-TPSS-Addendum-5.pdf

SEPTA

TRACTION POWER SUBSTATION

REHABILITATION

CONTRACT 4

MARKET - RANSTEAD - ELLEN

PECO 13.2 kV SERVICE FAULT DUTY

Go to PDF page 8 of 16 for Contract 5 PECO data.

E-Mail Transmittal Distribution Standards & Customer Engineering

1050 W. Swedesford Road Berwyn, PA 19312

August 15, 2016

Mr. Robert J. Verhelle Senior Director / Associate Vice President NED Rail Department

HNTB CORPORATION

680 American Avenue, Suite 100 King of Prussia, PA 19406 Email: rverhelle@hntb.com

Subject: SEPTA Substation at 4600 Market Street – Available Fault Current and Upstream Over-Current Device Settings

Dear Bob:

The following 13.2 KV fault current information is provided to assist in the study for SEPTA at their 4600 Market Street in Philadelphia Substation (T-1670). The maximum fault current from either 13.2 kV circuit is 6,300 Amps, symmetrical at the head of each circuit and the minimum is estimated at 1,200 Amps, symmetrical at the end of each circuit. An estimation of the actual available fault currents at the service delivery points are as follows:

Parrish-140 University-131

3 Phase Amps – 100 MVA,

13.8 kV Base

3,979 Symmetrical Amps X/R = 4.7

4,548 Symmetrical Amps X/R = 10.3

1 Phase Amps – 100 MVA,

13.8 kV Base

3,257 Symmetrical Amps X/R = 3.4

4,392 Symmetrical Amps X/R = 8.1

The estimated values of fault current may change at any time, without notice to the customer.

The value may range from the guaranteed maximum of 6,300 symmetrical to the estimated minimum of 1,200 symmetrical.

The customer’s service entrance over-current protection settings are as follows:

Phase Settings:

Relay – ABB 51Y Curve – Inverse CT Ratio – 120/1 Phase Setting – 5.0 A (Secondary); 600 A (Primary); Delay (Time Dial = 2.0) Instantaneous – 25 x Phase Tap Setting = 125 A (Secondary); 15,000 A (Primary)

Ground Relay Relay – ABB 51Y Curve – Inverse CT Ratio – 120/1 Phase Setting – 1.5 A (Secondary); 180 A (Primary); Delay (Time Dial = 1.0) Instantaneous – 3 x Ground Tap Setting = 4.5 A (Secondary); 540 A (Primary)

4600 TPSS LOCATION IS ONE

TPSS WEST OF MARKET

&33RD STREETS TPSS

Mr. Robert J. Verhelle - HNTB CORPORATION SEPTA Substation at 4600 Market Street - Available Fault Current and Upstream Over-Current Device Settings

August 15, 2016 page 2

The PECO upstream over-current protection settings associated with Parrish-140 and University- 131 services are as follows:

PECO Parrish-140 Relay Relay – Schweitzer SEL-251-D Curve – U3 (Very Inverse) CT Ratio – 120/1 Phase Setting – 5.0 A (Secondary); 600 A (Primary); Time Dial – 3.28 Ground Setting – 5.0 A (Secondary); 600 A (Primary); Time Dial – 3.28 No Instantaneous on Phase or Ground

PECO University-131 Relay Relay – GE IAC-53 Curve –Very Inverse CT Ratio – 120/1 Phase Setting – 5.0 A (Secondary); 600 A (Primary); Time Delay – 70 Cycles @ 400% of Pickup Ground Setting – 5.0 A (Secondary); 600 A (Primary); Time Delay – 70 Cycles @ 400% of Pickup No Instantaneous on Phase or Ground

Our comments do not relieve the designer of the responsibility for an adequate design. The designer has the responsibility that the installation is in accordance with the National Electrical Code, the National Electrical Safety Code and other codes that apply. The design shall also meet requirements listed in PECO’s Electric Service Requirements handbook. A link to this document is attached here for your convenience.

https://www.peco.com/PartnersinBusiness/BuildersandContractors/Pages/Guidelines.aspx

If you have any questions concerning these comments, please contact me on (610) 725–7174.

Sincerely, Chuck Boeggeman Senior Engineer PECO Energy (An Exelon Company) Distribution Standards 1050 West Swedesford Road Berwyn, PA 19312 charles.boeggeman@exeloncorp.com

CJB/

Available Fault Current and PECO Upstream Over-Current Protection Settings (T-1670).doc-64 cc: M. P. Keller – Manager, Distribution Standards & Customer Engineering P. M. Kirlin – Senior Account Executive, LCS

1050 W. Swedesford Road Berwyn, PA 19312

August 15, 2016

Mr. Robert J. Verhelle Senior Director / Associate Vice President NED Rail Department

HNTB CORPORATION

680 American Avenue, Suite 100 King of Prussia, PA 19406 Email: rverhelle@hntb.com

Subject: SEPTA Substation at 2075 Ranstead Street – Available Fault Current and Upstream Over-Current Device Settings

Dear Bob:

The following 13.2 KV fault current information is provided to assist in the study for SEPTA at their 2075 Ranstead Street, Philadelphia Substation (T-8346). The maximum fault current from either 13.2 kV circuit is 6,300 Amps, symmetrical at the head of each circuit and the minimum is estimated at 1,200 Amps, symmetrical at the end of each circuit. An estimation of the actual available fault currents at the service delivery points are as follows:

Line 2471 Grays Ferry Substation

Line 2477 Grays Ferry Substation

3 Phase Amps – 100 MVA,

13.8 kV Base

3,838 Symmetrical Amps X/R = 3.0

4,472 Symmetrical Amps X/R = 4.6

1 Phase Amps – 100 MVA,

13.8 kV Base

3,283 Symmetrical Amps X/R = 2.3

4,059 Symmetrical Amps X/R = 3.5

The estimated values of fault current may change at any time, without notice to the customer.

The value may range from the guaranteed maximum of 6,300 symmetrical to the estimated minimum of 1,200 symmetrical.

The customer’s service entrance over-current protection settings are as follows:

Phase Settings:

Relay – ABB 51Y Curve – Inverse CT Ratio – 200/1 Phase Setting – 2.5 A (Secondary); 500 A (Primary); Delay (20 Cycles @ 400% of Pickup) Instantaneous – 20 x 2.5 = 50 A (Secondary); 10,000 A (Primary)

Ground Relay Relay – ABB 51Y Curve – Inverse CT Ratio – 200/1 Phase Setting – 1.0 A (Secondary); 200 A (Primary); Delay (15 Cycles @ 400% of Pickup) Instantaneous – 5 x 1.0 = 5.0 A (Secondary); 1,000 A (Primary)

SEPTA Substation at 2075 Ranstead Street - Available Fault Current and Upstream Over-Current Device Settings

August 15, 2016 page 2

The PECO upstream over-current protection settings associated with Line 2471 and Line 2477 services are as follows:

PECO Line 2471 Relay Relay – Schweitzer SEL-251D Curve – U3 (Very Inverse) CT Ratio – 120/1 Phase Setting – 5.0 A (Secondary); 600 A (Primary); Time Dial – 3.28 Ground Setting – 5.0 A (Secondary); 600 A (Primary); Time Dial – 3.28 No Instantaneous on Phase or Ground

PECO Line 2477 Relay Relay – Schweitzer SEL-251D Curve – U3 (Very Inverse) CT Ratio – 120/1 Phase Setting – 5.0 A (Secondary); 600 A (Primary); Time Dial – 3.28 Ground Setting – 5.0 A (Secondary); 600 A (Primary); Time Dial – 3.28 No Instantaneous on Phase or Ground

Our comments do not relieve the designer of the responsibility for an adequate design. The designer has the responsibility that the installation is in accordance with the National Electrical Code, the National Electrical Safety Code and other codes that apply. The design shall also meet requirements listed in PECO’s Electric Service Requirements handbook. A link to this document is attached here for your convenience.

https://www.peco.com/PartnersinBusiness/BuildersandContractors/Pages/Guidelines.aspx

If you have any questions concerning these comments, please contact me on (610) 725–7174.

Sincerely, Chuck Boeggeman Senior Engineer PECO Energy (An Exelon Company) Distribution Standards 1050 West Swedesford Road Berwyn, PA 19312 charles.boeggeman@exeloncorp.com

CJB/

Available Fault Current and PECO Upstream Over-Current Protection Settings (T-8346).doc-29

P. M. Kirlin – Senior Account Executive, LCS

September 6, 2016 Mr Robert Verhelle HNTB Corporation 2 West Lafayette St Suite 280 Norristown Pa 19401

Subject: SEPTA Ellen Sub

13.2 KV Service Fault Duty

Dear Mr Robert Verhelle:

As requested in your e-mail dated 8/10/2016, the following 13.2 KV fault current information is provided to assist in your electrical system studies for SEPTA Ellen Sub, 946 N Front St, Philadelphia. The maximum fault current from either PECO-Energy’s circuit is 6,300 Amps, symmetrical (X/R=26) and the minimum is estimated at 1,200 Amps, symmetrical (X/R=2). An estimation of the actual fault currents at the customer’s 13.2 KV service substation, at this time is:

TUNA-132 TUNA-144

3 PHASE Amps @ 13.8 KV 4,604 Sym Amps X/R = 7.3 4,750 Sym Amps X/R = 7.4 1 PHASE Amps @ 13.8 KV 4,292 Sym Amps X/R = 5.5 4,519 Sym Amps X/R = 5.6 Circuit Length 5,318 Ft 5,118 Ft

The estimated values of fault current may change at any time, without notice to the customer. The value may range from the guaranteed maximum to the estimated minimum.

This customer receives 13,200 Volt service and owns, operates, and maintains all of the 13,200 Volt service equipment and transformers. You should verify service switch, fuse, circuit breaker, and transformer ratings with the customer.

PECO’s records indicate that the customer has a service circuit breaker with relays set as follows:

RELAY SETTNGS

1 – Westinghouse CO-8 PHASE OVERCURRENT RELAYS, 1 – 12 Time 6 – 144 INSTANTANEOUS – MODEL #CO-8H1111N Curve – Inverse

720 A PRI – 600/5 CT –6 A TAP – Time 55 CYCLES @ 400% DELAY Instantaneous Inoperative

1 – Westinghouse CO-2 OVERCURRENT GROUNG RELAY, 0.5 – 2.5 Time 4 – 16 INSTANTANEOUS – MODEL #1875225 Curve –

120 A PRI – 600/5 CT – 1 A TAP – Time 15 CYCLES @ 400% DELAY Instantaneous Inoperative

3 -Westinghouse CR-8 DIRECTIONAL PHASE OVERCURRENT RELAYS, 2-6 Time MODEL #1875225 Curve –

240 A PRI – 600/5 CT – 2 A TAP – Time 15 CYCLES @ 400% DELAY

SEPTA Ellen Sub September 6, 2016 page 2

The next available upstream overcurrent devices from the customer service relays are:PECO’s Line overcurrent relays, which are as follows:

TUNA-132 – SEL 351

Phase Elements - Curve #3 Very Inverse

600 Amp primary pick-up Time Dial = 3.28 No Instantaneous

Ground Element - Curve #3 Very Inverse 600 Amp primary pick-up Time Dial = 3.28 No Instantaneous

TUNA-144 – SEL-351

Phase Elements - Curve #3 Very Inverse

840 Amp primary pick-up Time Dial = 2.82 No Instantaneous

Ground Element - Curve #3 Very Inverse 420 Amp primary pick-up Time Dial = 3.0 No Instantaneous

Our comments do not relieve the designer of the responsibility for an adequate design. He has the responsibility that the installation is in accordance with the National Electrical Code, the National Electrical Safety Code and other codes which apply.

If you have any questions concerning these comments, please contact me on (215) 956 - 3357.

Sincerely, Barry N. Hornberger Distribution Standards Customer Engineering 400 Park Ave Warminster, PA 18974 bnh/FAULT T-8302 SEPTA Ellen Sub 2016=0321.doc-15 cc: P.M. Kirlin

M.P. Keller

SEPTA

TRACTION POWER SUBSTATION

REHABILITATION

CONTRACT 5

BROAD - PARK - LOUDON - CASTOR

PECO 13.2 kV SERVICE FAULT DUTY

August 30, 2016

HNTB Corporation 2 West Lafayette St Suite 280 Norristown Pa 19401

Subject: SEPTA - Mt Vernon Sub

13.2 KV Service Fault Duty

Dear Mr Robert Verhelle:

As requested in your e-mail dated 8/10/2016, the following 13.2 KV fault current information is provided to assist in your electrical system studies for SEPTA - Mt Vernon Sub, 1245 Mt Vernon St, Philadelphia.

The maximum fault current from either PECO-Energy’s circuit is 6,300 Amps, symmetrical (X/R=26) and the minimum is estimated at 1,200 Amps, symmetrical (X/R=2). An estimation of the actual fault currents at the customer’s 13.2 KV service substation, at this time is:

TUNA LINE-532 TUNA LINE-540

3 PHASE Amps @ 13.8 KV 3,923 Sym Amps X/R = 3.4 4,121 Sym Amps X/R = 3.9 1 PHASE Amps @ 13.8 KV 3,438 Sym Amps X/R = 2.6 3.682 Sym Amps X/R = 3.0 Circuit Length 15,169 Ft 12,594 Ft

The estimated values of fault current may change at any time, without notice to the customer. The value may range from the guaranteed maximum to the estimated minimum.

This customer receives 13,200 Volt service and owns, operates, and maintains all of the 13,200 Volt service equipment and transformers. You should verify service switch, fuse, circuit breaker, and transformer ratings with the customer.

PECO’s records indicate that the customer has a service circuit breaker with relays set as follows:

RELAY SETTNGS

3 – ABB MicroShield 51 PHASE OVERCURRENT RELAYS, 4 – 12 Time 2 - 20 INSTANTANEOUS – MODEL #443S2341 Curve – VERY INVERSE

480 A PRI – 300/5 CT – 8 A TAP – Time 64 CYCLES @ 400% DELAY (TD 3) 1,400 A PRI – 300/5 CT – 3 X TD PU or 24 x CT Ratio Instantaneous

1 – ABB MicroShield 51 GROUND OVERCURRENT RELAY, 1.5 – 6 Time 2 - 20 INSTANTANEOUS – MODEL #443S2341 Curve – VERY INVERSE

90 A PRI – 300/5 CT – 1.5 A TAP – Time 16 CYCLES @ 400% DELAY (TD 1) 180 A PRI – 300/5 CT – 2 X TD PU or 3 x CT Ratio Instantaneous

SEPTA - Mt Vernon Sub August 30, 2016 page 2

The next available upstream overcurrent devices from the customer service fuse are:PECO’s Line overcurrent relays, which are as follows:

TUNA LINE-532 – SEL-351

Phase Elements - Curve #3 Very Inverse

960 Amp primary pick-up Time Dial = 3,28 No Instantaneous

Ground Element - Curve #3 Very Inverse 840 Amp primary pick-up Time Dial = 3.76 No Instantaneous

TUNA LINE-532 – SEL-351

Phase Elements - Curve #3 Very Inverse

840 Amp primary pick-up Time Dial = 3,28 No Instantaneous

Ground Element - Curve #3 Very Inverse 720 Amp primary pick-up Time Dial = 3.28 No Instantaneous

Our comments do not relieve the designer of the responsibility for an adequate design. He has the responsibility that the installation is in accordance with the National Electrical Code, the National Electrical Safety Code and other codes which apply.

If you have any questions concerning these comments, please contact me on (215) 956 - 3357.

Sincerely, Barry N. Hornberger Distribution Standards Customer Engineering 400 Park Ave Warminster, PA 18974 bnh/FAULT T-8324 SEPTA Mt Vernon Sub 2016=0318.doc-45

1050 W. Swedesford Road Berwyn, PA 19312

August 15, 2016

Mr. Robert J. Verhelle Senior Director / Associate Vice President NED Rail Department

HNTB CORPORATION

680 American Avenue, Suite 100 King of Prussia, PA 19406 Email: rverhelle@hntb.com

Subject: SEPTA Substation at 2440 N. Park Avenue – Available Fault Current and Upstream Over-Current Device Settings

Dear Bob:

The following 13.2 KV fault current information is provided to assist in the study for SEPTA at their 2440 N. Park Avenue, Philadelphia Substation (T-8329). The maximum fault current from either 13.2 kV circuit is 6,300 Amps, symmetrical at the head of each circuit and the minimum is estimated at 1,200 Amps, symmetrical at the end of each circuit. An estimation of the actual available fault currents at the service delivery points are as follows:

Line 1071 Westmoreland Substation

Line 2167 Westmoreland Substation

3 Phase Amps – 100 MVA,

13.8 kV Base

4,347 Symmetrical Amps X/R = 4.0

4,133 Symmetrical Amps X/R = 3.5

1 Phase Amps – 100 MVA,

13.8 kV Base

3,896 Symmetrical Amps X/R = 3.1

3,630 Symmetrical Amps X/R = 2.7

The estimated values of fault current may change at any time, without notice to the customer.

The value may range from the guaranteed maximum of 6,300 symmetrical to the estimated minimum of 1,200 symmetrical.

The customer’s service entrance over-current protection settings are as follows:

Phase Settings:

Relay – ABB C0-8 Curve – Inverse CT Ratio – 120/1 Phase Setting – 3 A (Secondary); 360 A (Primary); Delay (40 Cycles @ 400% of Pickup) No Instantaneous

Ground Relay Relay – ABB C0-8 Curve – Inverse CT Ratio – 120/1 Phase Setting – 2.5 A (Secondary); 300 A (Primary); Delay (40 Cycles @ 400% of Pickup) No Instantaneous

SEPTA Substation at 2440 N. Park Avenue - Available Fault Current and Upstream Over-Current Device Settings

August 15, 2016 page 2

The PECO upstream over-current protection settings associated with Line 1071 and Line 2167 services are as follows:

PECO Line 1071 Relay Relay – Schweitzer SEL-351-OM Curve – U1 (Moderately Inverse) CT Ratio – 240/1 Phase Setting – 4.0 A (Secondary); 960 A (Primary); Time Dial – 2.55 Ground Setting – 2.67 A (Secondary); 640.8 A (Primary); Time Dial – 2.55 No Instantaneous on Phase or Ground

PECO Line 2167 Relay Relay – Schweitzer SEL-351-OM Curve – U1 (Moderately Inverse) CT Ratio – 240/1 Phase Setting – 2.5 A (Secondary); 600 A (Primary); Time Dial – 2.12 Ground Setting – 2.5 A (Secondary); 600 A (Primary); Time Dial – 2.12 No Instantaneous on Phase or Ground

Our comments do not relieve the designer of the responsibility for an adequate design. The designer has the responsibility that the installation is in accordance with the National Electrical Code, the National Electrical Safety Code and other codes that apply. The design shall also meet requirements listed in PECO’s Electric Service Requirements handbook. A link to this document is attached here for your convenience.

https://www.peco.com/PartnersinBusiness/BuildersandContractors/Pages/Guidelines.aspx

If you have any questions concerning these comments, please contact me on (610) 725–7174.

Sincerely, Chuck Boeggeman Senior Engineer PECO Energy (An Exelon Company) Distribution Standards 1050 West Swedesford Road Berwyn, PA 19312 charles.boeggeman@exeloncorp.com 610-725-7174 (Voice)

CJB/

Available Fault Current and PECO Upstream Over-Current Protection Settings (T-8329).doc-89

P. M. Kirlin – Senior Account Executive, ESO

September 2, 2016

HNTB Corporation 2 West Lafayette St Suite 280 Norristown Pa 19401

Subject: SEPTA Louden Sub

13.2 KV Service Fault Duty

Dear Mr Robert Verhelle:

As requested in your e-mail dated 8/10/2016, the following 13.2 KV fault current information is provided to assist in your electrical system studies for SEPTA Louden Sub, 1410 W Louden St, Philadelphia. The maximum fault current from either PECO-Energy’s circuit is 6,300 Amps, symmetrical (X/R=26) and the minimum is estimated at 1,200 Amps, symmetrical (X/R=2). An estimation of the actual fault currents at the customer’s 13.2 KV service substation, at this time is:

WESTMORELAND LINE-1077 TABOR-136

3 PHASE Amps @ 13.8 KV 4,060 Sym Amps X/R = 3.4 3,928 Sym Amps X/R = 4.8 1 PHASE Amps @ 13.8 KV 3,544 Sym Amps X/R = 2.6 3,357 Sym Amps X/R = 3.6 Circuit Length 13,795 Ft 9,270 Ft

The estimated values of fault current may change at any time, without notice to the customer. The value may range from the guaranteed maximum to the estimated minimum.

This customer receives 13,200 Volt service and owns, operates, and maintains all of the 13,200 Volt service equipment and transformers. You should verify service switch, fuse, circuit breaker, and transformer ratings with the customer.

PECO’s records indicate that the customer has a service circuit breaker with relays set as follows:

T-8318 RELAY SETTNGS

3 – Westinghouse CO-8 PHASE OVERCURRENT RELAYS, __ – __ Time __ – __ INSTANTANEOUS – MODEL# CO-8H1111N Curve – INVERSE

600 A PRI – 600/5 CT – 5 A TAP – Time 50 CYCLES @ 400% DELAY (TD __) Instantaneous Disconnected

1 – Westinghouse CO-8 GROUND OVERCURRENT RELAY, __ – __ Time __ – __ INSTANTANEOUS – MODEL# CO-8L1111N Curve – INVERSE

300 A PRI – 600/5 CT – 2.5 A TAP – Time 55 CYCLES @ 400% DELAY (TD __) Instantaneous Disconnected

3 – Westinghouse CR-8 Directional PHASE OVERCURRENT RELAYS, __ – __ Time __ – __ INSTANTANEOUS – MODEL# 1875579 Curve – INVERSE

240 A PRI – 600/5 CT – 2 A TAP – Time 15 CYCLES @ 400% DELAY (TD __) No Instantaneous

SEPTA Louden Sub September 2, 2016 page 2

The next available upstream overcurrent devices from the customer service relays are PECO’s Line overcurrent relays, which are as follows:

TABOR-136 – GECO 12IAC53B

Phase % Ground Elements - Very Inverse

600 Amp primary pick-up Time Delay 70 Cycles @ 400% No Instantaneous

WESTMORELAND LINE-1077 – SEL-351

Phase Elements - Curve #U1 Moderately Inverse

960 Amp primary pick-up Time Dial = 1.49 No Instantaneous

Ground Element - Curve #U1 Moderately Inverse 640 Amp primary pick-up Time Dial = 1.74 No Instantaneous

Our comments do not relieve the designer of the responsibility for an adequate design. He has the responsibility that the installation is in accordance with the National Electrical Code, the National Electrical Safety Code and other codes which apply.

If you have any questions concerning these comments, please contact me on (215) 956 - 3357.

Sincerely, Barry N. Hornberger Distribution Standards Customer Engineering 400 Park Ave Warminster, PA 18974 bnh/FAULT T-8318 SEPTA Louden Sub 2016=0319.doc-37

September 1, 2016

HNTB Corporation 2 West Lafayette St Suite 280 Norristown Pa 19401

Subject: SEPTA Castor Sub

13.2 KV Service Fault Duty

Dear Mr Robert Verhelle:

As requested in your e-mail dated 8/10/2016, the following 13.2 KV fault current information is provided to assist in your electrical system studies for SEPTA Castor Sub, 8355 Castor Ave Philadelphia. The maximum fault current from PECO-Energy’s circuit is 6,300 Amps, symmetrical (X/R=26) and the minimum is estimated at 1,200 Amps, symmetrical (X/R=2). An estimation of the actual fault currents at the customer’s 13.2 KV service substation, at this time is:

FOX CHASE - 138

3 PHASE Amps @ 13.8 KV 3,859 Sym Amps X/R = 5.4 1 PHASE Amps @ 13.8 KV 3,334 Sym Amps X/R = 4.1 Circuit Length 9,387 Ft

The estimated values of fault current may change at any time, without notice to the customer. The value may range from the guaranteed maximum to the estimated minimum.

This customer receives 13,200 Volt service and owns, operates, and maintains all of the 13,200 Volt service equipment and transformers. You should verify service switch, fuse, circuit breaker, and transformer ratings with the customer.

PECO’s records indicate that the customer has a service circuit breaker with relays set as follows:

T-8307 RELAY SETTNGS

3 – GECO IAC-51B PHASE OVERCURRENT RELAYS, __ – __ Time __ – __ INSTANTANEOUS – MODEL #12IAC51B4A Curve – INVERSE

320 A PRI – 100/5 CT – 16 A TAP –

1,400 A PRI – 100/5 CT – 70 A TAP – Instantaneous

NO GROUND OVERCURRENT RELAY

The next available upstream overcurrent device from the customer service relays are:PECO’s 13.2 kV Service Terminal Pole fused cutouts – S&C K Speed Positrol fuses sized at 140 Amps

SEPTA Castor Sub September 1, 2016 page 2

Our comments do not relieve the designer of the responsibility for an adequate design. He has the responsibility that the installation is in accordance with the National Electrical Code, the National Electrical Safety Code and other codes which apply.

If you have any questions concerning these comments, please contact me on (215) 956 - 3357.

Sincerely, Barry N. Hornberger Distribution Standards Customer Engineering 400 Park Ave Warminster, PA 18974 bnh/FAULT T-8307 SEPTA Castor Sub 2016=0320.doc-1