Derby's Street Lighting PFI Contract

Brierfield Way, Mickleover - Part One

The columns due for removal on this road were:

Seq. No. Lamp Number Location Lamp Type Watt Isolation Point
1 98907 OPP BRIERFIELD HS SXPL3 55  
2 98908 OPP PENDLEBURY DR SXPL3 55  
3 98909 OPP LAY-BY SXPL3 55  
4 98910 OPP NOS 8/10 SXPL3 55  
5 98911 OPP NOS 12/14 SXPL3 55 Y - Isolates 98908-28?
6 98912 OPP NOS 16/18 SXPL3 55  
7 98913 OPP NO 20 SXPL3 55  
8 98914 OPP NO 2 DOWNHAM CL SXPL3 55  
9 98915 OPP DOWNHAM CL SXPL3 55  
10 98916 OPP RR DOWNHAM CL SXPL3 55  
11 98917 OPP RR DOWNHAM CL SXPL3 55  
12 98918 OPP F/PATH LINK SXPL3 55  
13 98919 OPP NO 26 SXPL3 55  
14 98920 OPP SPRINGDALE CRT SXPL3 55  
15 98921 OPP SPRINGDALE CRT SXPL3 55  
16 98922 OPP LAY-OUT SXPL3 55  
17 98923 OPP LAY-BY SXPL3 55  
18 98924 OPP SKIDDAW DR SXPL3 55  
19 98925 OPP SKIDDAW DR SXPL3 55  
20 98926 REAR SKIDDAW DR SXPL3 55  
21 98927 OPP NO 9 GABLE CT SXPL3 55  
22 98928 OPP NO 1 GABLE CT SXPL3 55  
23 98929 OPP BLENCATHRA DR SXPL3 55  
24 98930 OPP RESERVOIR SXPL3 55  
25 98931 OPP BLENCATHRA DR SXPL3 55  
26 98932 OPP KIPLING DR SXPL3 55  
27 98933 ON GREEN AREA SXPL3 55  
28 98934 ON GREEN AREA SXPL3 55  
29 98935 T JUNCTION SXPL3 55  
30 98936 OS FIELD SXPL3 55  
31 98937 O/S FIELD SXPL3 55  
32 98938 JNC THE HOLLOW SXPL3 55 Y - Isolates 98932-7

The majority of the outgoing columns still retained their original GEC Z9538 55 W SOX lanterns, although some lanterns had been replaced over the years. Notably, the first two columns from Uttoxeter Road had been replaced in their entirety in the early 2000s. The replacement columns (made by CU Phosco) were both 8 m in height (as opposed to the 6 m columns they replaced) and Thorn Alpha 4 90 W SOX lanterns were fitted.

The columns installed under the PFI are either 9 m or 10 m in height.

The following photographs were taken on Sunday, 18th July 2010 unless otherwise specified.

The first Alpha 4 was missing one of its rear bowl clips; hence the need for the bowl to instead be cable-tied in place.

This night photograph, taken on Friday, 6th August shows that work progressed quickly - the Alpha 4s had disappeared by this date.

The first 'original' installation (98909) had seen its Z9538 replaced with a Thorn Beta 2 at some point. Owing to the outgoing column being situated within a tree (of course, the tree would have been considerably smaller when the column was installed in (around) 1980!), the PFI replacement column is located a couple of metres away, and is fitted with an outreach bracket, in order to improve the effectiveness of the lighting along this part of the road.

The Beta 2 was fitted with a Royce Thompson SC1000 photocell; this shows that the lantern has been re-celled since the PFI commenced.

The following column still retained its Z9538, however. This lantern is also fitted with an SC1000 photocell.

The column on the left of this picture (98911) is the control (and group switch) point for the other lights on this section of road. Originally, the 'slave' lanterns were all fitted with photocell shorting plugs, however, all were fitted with individual photocells at the end of their operation. While this did prevent the other lighting on the circuit from dayburning if the control cell developed this fault, it did mean that, if some of the slave photocells were more sensitive than the control cell was, these would have switched the lamp off again after a few seconds, until they then decided that the ambient light levels were insufficient, and switched the lamp back on. I had always wanted to wire out every slave NEMA socket on this circuit, in order to prevent this from happening (having individually-celled lanterns on a group-switched circuit is a real hate of mine!), though the PFI beat me to it - the new lanterns are individually celled, but the circuit will be altered, in order that the control point's cell no longer switches the rest of the circuit.

By Sunday, 25th July 2010, excavations around the column bases had commenced. The following photograph shows the three cables surrounding the base of column 98911 - the single 'horizontal' cable visible to the left of the column is the incoming Electricity Company supply; the two 'vertical' cables are outgoing cables, belonging to Derby City Council, which feed the other lamps on the circuit.

The following night photograph, again taken on Friday, 6th August, shows that only the control point Z9538 was the only SOX lantern still remaining.

Moving further along the road, and looking back the other way, the outgoing columns are seen almost exactly in-line with their replacements.

The Beta 2 seen on the right in the above picture is seen again below; this was fitted with a Royce Thompson Monostar 1000 photocell.

Again, this was followed by another surviving Z9538.

The next few outgoing columns supported Philips MI 36 (XGS 104) lanterns. Despite these lanterns being slightly newer than the Z9538s by about a decade, they shared similar amounts of weathering to their canopies!

The next column was one of the few to still retain its rubber sealing bung at the top of the column shaft:

About a week before these pictures were taken, the lantern had rotated approximately 90 degrees clockwise on its bracket; I assume that this happened when the new column was installed alongside, as the lantern was fine before this occurred. Despite being ready for removal, the lantern was quickly re-orientated to its correct position.

The replacement columns here were also fitted with outreach brackets in order to bring the lanterns out of adjacent trees. The difference in height between the outgoing 6 m column and new 10 m column is very evident here.

A close-up of the above Z9538; this lantern is fitted with a Zodion SS3DR photocell:

CONTINUE TO PART TWO


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